Excellent! Muffin can see how much the actual traffic is different from the planned one. Bu watching traffic using the method of unfaltering gaze is unscientific and inefficient. It is better to invoke dry statistics, which will help us understand what is going wrong in a non-obvious situation.
Now you need to add to the program the average number of visits for the observed period. If this value is below the recommended one, Muffin will have to think about increasing his traffic.
The average value is calculated using the formula: sum of all values divided by their number. Let’s calculate the average number of visits per day and log this value in the console.
<!DOCTYPE html><html lang="en" class="no-js"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1"><script>var b=document.documentElement.classList;b.remove('no-js');if(!window.Promise||!window.sessionStorage||!!sessionStorage.getItem('muller.v2')){b.add('muller')}</script><link rel="dns-prefetch" href="https://assets.htmlacademy.org"><script async src="https://www.googletagmanager.com/gtag/js?id=G-MXPCRXM48C"></script><script>
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());
gtag('config', 'G-MXPCRXM48C');
</script><script type="text/javascript">
(function(e,t){var n=e.amplitude||{_q:[],_iq:{}};var r=t.createElement("script")
;r.type="text/javascript"
;r.integrity="sha384-d/yhnowERvm+7eCU79T/bYjOiMmq4F11ElWYLmt0ktvYEVgqLDazh4+gW9CKMpYW"
;r.crossOrigin="anonymous";r.async=true
;r.src="https://cdn.amplitude.com/libs/amplitude-5.2.2-min.gz.js"
;r.onload=function(){if(!e.amplitude.runQueuedFunctions){
console.log("[Amplitude] Error: could not load SDK")}}
;var i=t.getElementsByTagName("script")[0];i.parentNode.insertBefore(r,i)
;function s(e,t){e.prototype[t]=function(){
this._q.push([t].concat(Array.prototype.slice.call(arguments,0)));return this}}
var o=function(){this._q=[];return this}
;var a=["add","append","clearAll","prepend","set","setOnce","unset"]
;for(var u=0;u<a.length;u++){s(o,a[u])}n.Identify=o;var c=function(){this._q=[]
;return this}
;var l=["setProductId","setQuantity","setPrice","setRevenueType","setEventProperties"]
;for(var p=0;p<l.length;p++){s(c,l[p])}n.Revenue=c
;var d=["init","logEvent","logRevenue","setUserId","setUserProperties","setOptOut","setVersionName","setDomain","setDeviceId","setGlobalUserProperties","identify","clearUserProperties","setGroup","logRevenueV2","regenerateDeviceId","groupIdentify","onInit","logEventWithTimestamp","logEventWithGroups","setSessionId","resetSessionId"]
;function v(e){function t(t){e[t]=function(){
e._q.push([t].concat(Array.prototype.slice.call(arguments,0)))}}
for(var n=0;n<d.length;n++){t(d[n])}}v(n);n.getInstance=function(e){
e=(!e||e.length===0?"$default_instance":e).toLowerCase()
;if(!n._iq.hasOwnProperty(e)){n._iq[e]={_q:[]};v(n._iq[e])}return n._iq[e]}
;e.amplitude=n})(window,document);
amplitude.getInstance().init("df11525b6880a3c5e2af14f9b6238408", null,{
includeUtm: true,
includeGclid: true,
includeReferrer: true,
deviceIdFromUrlParam: true
}, function (instance) {
window.amplitudeLoaded = true;
});
</script><link rel="stylesheet" href="https://assets.htmlacademy.org/css/core.v284.css"><link rel="stylesheet" href="https://assets.htmlacademy.org/css/profile.v236.css"><link rel="stylesheet" href="https://assets.htmlacademy.org/css/course.v246.css"><link rel="stylesheet" href="https://assets.htmlacademy.org/css/course-interface-light.v20.css"><link rel="stylesheet" href="https://assets.htmlacademy.org/css/course-interface-en.v2.css"><script src="https://assets.htmlacademy.org/js/sentry.js" data-sentry="3774884cc81746ed84c0ba7c5cd4ac7b" data-project="26" data-version="2"></script><link rel="stylesheet" href="/css/custom.css"><link rel="stylesheet" href="/css/cookies.css"><link rel="preload" as="script" href="https://assets.htmlacademy.org/js/general.v274.js"><title>Average value — Arrays — HTML Academy</title><meta name="csrf-token" content="9464caf322823086fca37a7326b9bd2a54"><meta property="og:type" content="website"><meta property="og:site_name" content="HTML Academy"><meta name="twitter:url" property="og:url" content="https://htmlacademy.org"><meta name="twitter:title" property="og:title" content="Interactive online courses HTML Academy"><meta name="twitter:description" property="og:description" content="Together we’ll learn how to work with real code, solve true-to-life problems, use cutting edge technologies. Minimum of boring theory and lots of practical tasks."><meta name="twitter:image" property="og:image" content="https://htmlacademy.org/og/htmlacademy.png"><meta name="twitter:card" content="summary_large_image"><link rel="canonical" href="https://htmlacademy.org/courses/javascript-programming/arrays/average-value"><meta name="theme-color" content="#2f358f"></head><body class="course-interface course-interface--light" data-base="/assets/courses/5/"><header class="page-header page-header--course"><div class="page-header__inner"><div class="page-header__top"><a class="page-header__logo" href="/" aria-label="HTML Academy Home"><img src="https://assets.htmlacademy.org/img/logo--small.svg?cs=1218aec0be4a5f23db79ad29a14e30f7f9fb9a25" width="24" height="36" alt="HTML Academy"></a><nav class="main-nav main-nav--mini" role="navigation"><div class="main-nav__course-nav"><a class="main-nav__course-item main-nav__course-button main-nav__course-button--prev" href="/courses/javascript-programming/arrays/big-data">Little Muffin and Big Data</a><div class="main-nav__course-item main-nav__course-list main-nav__course-list--collapsed"><b class="main-nav__course-title">Arrays</b><span class="main-nav__course-stat">2/30</span><div class="main-nav__course-contents"><a class="main-nav__course-contents-link" href="/courses/javascript-programming/arrays">Back to the list of tasks</a><ul class="main-nav__course-contents-list"><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/arrays/big-data">1. Little Muffin and Big Data</a></li><li class="main-nav__course-contents-item main-nav__course-contents-item--current"><a href="/courses/javascript-programming/arrays/average-value">2. Average value</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/arrays/analizer-almost-ready">3. Finishing the traffic analyzer</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/arrays/new-datum">4. New data</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/arrays/massive-data">5. A lot of data? An array!</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/arrays/read-from-array">6. Reading from an array using index</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/arrays/variable-as-index">7. Variable as index</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/arrays/array-length">8. Array length</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/arrays/loop-through-array">9. Let’s hit arrays with loops!</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/arrays/sum-in-loop">10. Summation in the loop</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/arrays/average-with-array">11. Finishing refactoring</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/arrays/one-little-investigation">12. One small analytical investigation</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/arrays/write-by-index">13. Writing to an array by index</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/arrays/investigation-completed">14. The murderer is a butler!</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/arrays/summary-1">15. Summary of “Arrays”. Part 1</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/arrays/cipher-beginner">16. Fifth program: Beginner decryptor</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/arrays/vague-suspicions">17. Vague suspicions</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/arrays/swap-elements">18. Swapping the elements</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/arrays/minimum-element">19. Looking for the minimum element</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/arrays/minimum-elemen-found">20. The minimum element is found!</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/arrays/start-sorting">21. Starting sorting</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/arrays/continue-sorting">22. Continue sorting</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/arrays/finish-sorting">23. Finish sorting</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/arrays/test-sorting">24. Testing the sorting</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/arrays/median-start">25. Median of an odd number of elements</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/arrays/median-end">26. Median of an even number of elements</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/arrays/investigation-continues">27. Green light</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/arrays/investigation-completed-again">28. The murderer is the butler, again!</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/arrays/summary-2">29. Summary of “Arrays”. Part 2</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/arrays/best-jumps-challenge">30. Sixth program: Long jump records</a></li></ul></div></div><a class="main-nav__course-item main-nav__course-button main-nav__course-button--next" href="/courses/javascript-programming/arrays/analizer-almost-ready">Finishing the traffic analyzer</a></div><ul class="main-nav__list main-nav__list--user main-nav__list--user-guest"><li class="main-nav__item" itemprop="name"><a class="main-nav__link" href="/signup?redirect_url=%2Fcourses%2Fjavascript-programming%2Farrays%2Faverage-value" title="Sign up" data-modal="open" data-value="register" itemprop="url"><span class="main-nav__icon" aria-hidden="true"><svg aria-hidden="true"><use xlink:href="/img/sprites/general.svg#user"></use></svg></span>Sign up</a></li><li class="main-nav__item main-nav__item--login" itemprop="name"><a class="main-nav__link" href="/login?redirect_url=%2Fcourses%2Fjavascript-programming%2Farrays%2Faverage-value" title="Log in" data-modal="open" data-value="login" itemprop="url"><span class="main-nav__icon" aria-hidden="true"><svg aria-hidden="true"><use xlink:href="/img/sprites/general.svg#login"></use></svg></span>Log in</a></li></ul></nav></div></div></header><div class="notice notice--error js--initialization-error hidden"><a class="notice__link" href="#"><span class="notice__title js--initialization-error__content"></span></a><button class="notice__close" type="button">Close</button></div><main class="course-container course-interface__content task"><div class="course-container__inner"><article class="course-layout js--user-settings" data-theme="ace/theme/ha-light-default" data-taskid="94" data-storageKey="task-94"><div class="course-loading-overlay course-layout__loading-overlay hidden"><div class="course-loading-overlay__inner"><span class="course-loading-overlay__image"><svg width="70" height="70" viewBox="0 0 70 70" xmlns="http://www.w3.org/2000/svg"><defs><clipPath id="clip-path" transform="translate(-3.2 -3.22)"><circle cx="38.65" cy="38.78" r="34.15" fill="#d5dcf1" stroke-dasharray="0"/></clipPath></defs><style>.keks-loader-circle { stroke-dasharray: 500; stroke-dashoffset: 1000; animation: dash 1.5s linear reverse infinite; } @keyframes dash { 0% { stroke-dashoffset: 0; }, 25% { stroke-dashoffset: 1000; }, 50% { stroke-dashoffset: 0; }, 75% { stroke-dashoffset: 1000; }, 100% { stroke-dashoffset: 0; } }</style><circle cx="35" cy="33" r="33" transform="matrix(.01053 -.96378 .9652 .01054 2.506 68.344)" fill="#D5DCF1" stroke="#F15A29" stroke-width="3.5"/><g transform="matrix(.9237 -.01338 0 .98374 2.38 -2.91)" clip-path="url(#clip-path)"><path d="M55.25 62.93c-1-2.23-2.81-5-4-7.27-.87-1.58-.39-3.35-2.32-3.16 0 0-2.81.84-3.88 1-1.07.16-4.65 3-5.91 3.44-1.55.56-3.29.19-4.93.19-1.686-.555-3.333-1.223-4.93-2-1-.74-7.26-2.32-7.45-1.77-.19.55-6.03 13.66-5.58 14.23.29.28 15 8.57 15.78 8.75 1.113.666 2.188 1.394 3.22 2.18.48.56 12.47-6 12.47-6.93 0 0 7.944-4.177 8.52-4.38 2.1-.74 2.804-.31-1-4.28h.01z" fill="#CF4A27"/><path d="M41.56 55.18c-.57-.47-1.06.46-.29 1 3.19 2.37 5.86 5.87 6.17 9.84-1.69-.58-3.44-.73-5.11-1.37a.53.53 0 0 0-.77.56 16.56 16.56 0 0 1-.07 4.57 12 12 0 0 1-4.29-2.88c-.29-.36-.87 0-.87.38-.17 1.7-.06 3.25-.9 4.72l-.15.15-.17-.17c-.82-1.46-.71-3-.88-4.68 0-.38-.59-.74-.87-.38a12.11 12.11 0 0 1-4.29 2.86 16.56 16.56 0 0 1-.07-4.56.53.53 0 0 0-.77-.56c-1.67.64-3.42.8-5.11 1.37.31-4 3-7.48 6.17-9.84.77-.56.29-1.49-.29-1-3.77 2.7-6.68 6.8-6.77 11.46a.51.51 0 0 0 .77.46c1.55-.71 3.33-.82 5-1.35-.15 1.61.13 3.14.13 4.79a.54.54 0 0 0 .77.46 21.65 21.65 0 0 0 4.47-2.6 9.28 9.28 0 0 0 1.09 4.37 2.32 2.32 0 0 0 .43.62l.1.06h.07a.59.59 0 0 0 .61-.1 2.1 2.1 0 0 0 .47-.72 9.49 9.49 0 0 0 1-4.31 22.19 22.19 0 0 0 4.48 2.6.54.54 0 0 0 .77-.46c0-1.65.28-3.17.13-4.79 1.68.53 3.45.64 5 1.35a.51.51 0 0 0 .77-.46c-.11-4.67-3-8.77-6.79-11.47z" fill="#F1662A"/><path d="M35.49 62.47s5-.38 6-1.49c4.65-5.4 9.1-6.7 9.1-6.7l-.68-1.39-14.53 2.8-13.37-2.7v1.49s3.49 1.21 8.24 6.61c1 1.1 5.14 1.38 5.24 1.38" style="isolation:isolate" fill="#A23922" opacity=".5"/><path d="M22.12 52.88c-1.75 5.5-5.33 8.66-6 14.34" fill="#F1662A"/><path d="M21.54 52.78c-1.64 5-5.33 9.12-6 14.43-.09.65.64 2 1.07 0 .68-5.21 4.45-9.31 6-14.16.19-.64-.87-.91-1.07-.27zm28.08.55c2 4.57 5.13 8.57 6.4 13.4.2.65 1.4.35 1.31-.29-1.25-4.93-4.7-9-6.83-13.67-.2-.55-1.17-.08-.88.57z" fill="#151841"/></g><circle class="keks-loader-circle" cx="35" cy="33" r="33" transform="matrix(.01053 -.96378 .9652 .01054 2.506 68.344)" fill="#D5DCF1" stroke-width="3.5" fill-opacity="0" stroke="#2A2F5A"/><path d="M54.838 32.26c-.084 4.648-.716 9.52-3.152 13.594-1.08 1.86-1.525 3.2-3.246 4.5-1.44 1.042-4.65.428-7.03 2.334 0 0-3.245 2.79-6.034 2.604-2.79-.186-5.403-2.427-5.403-2.427-1.348-1.293-4.584-1.562-6.574-2.25-2.344-.865-6.036-8.053-6.296-9.3l-.633-2.426c-.808-1.86-.994-3.98-1.98-5.887-.673-1.056-1.178-2.21-1.496-3.422-.55-2.603-1.163-5.28-1.628-7.875-.81-3.896-2.427-10.23.186-13.502 0 0 2.94-.67 8.192 4.845 2.52 2.25 5.04 6.51 8.193 7.7.62-.678 1.18-1.41 1.673-2.186.86.79 1.986 1.22 3.153 1.21.716 0 1.264-.69 1.794-.69.46.105.912.248 1.35.428 1.858.78 1.793-.864 2.872-.78 1.078.083 1.078 2.073 3.42.78l1.163-.018c2.976-3.115 8.908-11.084 13.948-9.96 4.502 1.126-.808 18.533-2.342 22.773" fill="#F15A29"/><path d="M59.422 11.486c-.93-3.72-5.216-2.334-7.56-.782-2.037 1.452-3.884 3.155-5.495 5.068-.716.78-1.442 1.646-2.25 2.51l-.93 1.042c-.312 0-.624.027-.93.084-.633.084-1.08.605-1.71.353-.35-.208-.664-.472-.93-.78-.554-.41-1.308-.41-1.86 0-.304.488-.882.73-1.442.605-.527-.242-1.07-.444-1.627-.605-.484-.003-.956.147-1.35.428-1.077.688-2.52-.26-3.328-.865-.246-.2-.608-.162-.81.084-.395.632-.84 1.232-1.328 1.795-2.427-1.21-4.138-3.47-5.766-5.45-1.53-1.704-3.177-3.3-4.928-4.78-.823-.765-1.765-1.394-2.79-1.86-.862-.325-1.788-.446-2.706-.352-.81 0-1.162 1.21-1.44 1.86-.434 1.19-.648 2.45-.633 3.72.097 2.626.46 5.237 1.077 7.792.363 1.562.55 3.198.93 4.76.243 1.77.667 3.507 1.265 5.19.812 1.57 1.532 3.19 2.157 4.844.362 1.21.808 2.427 1.078 3.636.312 1.247.735 2.464 1.265 3.635 1.11 2.42 2.566 4.667 4.323 6.668 1.71 1.86 4.585 1.47 6.75 2.51 2.075 1.47 4.325 2.94 6.845 3.292 2.52.353 5.04-1.562 7.208-3.2 1.71-.78 3.608-.78 5.402-1.384 1.795-.605 2.79-2.604 3.608-4.073 1.27-2.134 2.238-4.434 2.874-6.835.503-2.078.79-4.204.855-6.34.05-.433.125-.86.223-1.285 1.22-3.304 2.213-6.687 2.976-10.126.827-3.72 1.813-7.71 1.004-11.158zm-.93 4.584c-.225 2.128-.586 4.24-1.078 6.323-.71 3.194-1.602 6.345-2.67 9.438-.262.617-.407 1.276-.427 1.945-.092 1.935-.34 3.86-.744 5.756-.58 2.34-1.49 4.585-2.706 6.668-.93 1.646-1.794 3.636-3.868 4.156-.93.26-1.796.354-2.614.52.007-.335-.352-.553-.647-.392-.022.012-.042.025-.06.04-.91.582-1.78 1.22-2.614 1.906-1.71 1.21-3.607 2.334-5.672 2.25-1.535-.203-2.994-.792-4.24-1.71-.363-.177-1.44-1.042-1.627-1.126-.716-.52-1.35-.93-2.074-1.47-.363-.26-.716.085-.716.522-.716-.177-1.348-.26-1.98-.428-1.86-.428-2.874-1.86-3.962-3.376-1.68-2.457-2.94-5.18-3.72-8.052-.27-.93-.632-1.86-.93-2.94-.31-1.408-.862-2.754-1.626-3.98-.773-1.45-1.29-3.022-1.526-4.648-.363-1.562-.716-3.2-.995-4.845-.448-2.426-.996-4.76-1.266-7.27-.186-2.158-.186-4.585 1.08-6.51.57-.054 1.146-.026 1.71.083.9.318 1.727.818 2.427 1.47 1.265.93 2.344 2.073 3.506 3.115 2.706 2.334 5.496 7.44 8.555 7.97.693-.605 1.297-1.303 1.796-2.075.79.56 1.707.908 2.668 1.014.508.065 1.022-.06 1.442-.354.54-.408 1.295-.373 1.794.084.67.408 1.52.375 2.158-.084.25-.282.57-.49.93-.604.344.18.657.412.93.688.59.452 1.366.584 2.073.353.447-.083.633-.26 1.08-.353.32.042.646-.02.93-.177 1.525-1.646 2.975-3.375 4.5-4.937 1.676-1.96 3.766-3.527 6.12-4.585 1.44-.604 3.328-.78 3.96.865.428 1.55.486 3.177.167 4.752z" fill="#151841"/><path d="M48.524 33.04c-.236-.845-.932-1.483-1.795-1.646-.705-.074-1.413-.102-2.12-.083.083-.604.548-2.51-.81-2.333-.716 0-1.44 2.073-1.86 2.603-.715 1.042-1.162.78-1.264-.428-.102-1.208.446-2.854-.55-3.115-.715-.083-1.263 1.293-1.524 2.158-.083.427-.548.78-.362-2.25 0-.782 0-2.855-.447-2.94h-.186c-1.264.085-2.157 4.94-2.52 6.324-.27-1.386-1.71-7.273-2.79-5.98-.14.61-.202 1.234-.185 1.86 0 .427-.084 3.375-.447 2.854-.186-.864-1.162-2.603-1.71-2.334-.995.865-.187 2.074-.447 3.292s-.632 1.47-1.264.354c-.363-.52-.995-2.604-1.71-2.688-1.266-.176-.93 1.73-.93 2.334-.69-.076-1.383-.104-2.075-.083-.852.156-1.558.75-1.86 1.56-.084.177 0 6.668 5.95 6.76.862.043 1.72-.103 2.52-.427.52-.13.995-.558 1.45-.214l6.11.4c.342-.36.847-.51 1.33-.4.925.493 1.934.808 2.976.93 3.06 0 5.765-1.21 6.667-3.98.307-.103-.056-2.353-.15-2.53z" fill="#EFA75B"/><path d="M23.67 33.998s3.783-.354 4.77.177c1.095.612 1.896 1.642 2.22 2.854-.492.19-1.003.333-1.524.427-.616.09-1.237.15-1.86.177-3.06-.354-3.607-3.636-3.607-3.636zm23.6.51s-3.72-.52-4.772-.082c-1.16.554-2.038 1.564-2.426 2.79l1.44.52c.604.18 1.23.266 1.86.26 3.18-.195 3.897-3.487 3.897-3.487zm-7.03 2.605c.27.084 1.16.428 1.44.52.53.155 1.076.242 1.627.26h.186c2.706-.083 3.608-2.854 3.72-3.29-1.053-.157-2.116-.235-3.18-.233-.487-.017-.973.042-1.442.176-1.128.46-1.992 1.402-2.35 2.567z" fill="#FFF"/><path d="M32.223 43.26c-.152-1.397-.03-2.81.363-4.157 0 0 .93-2.94 2.343-3.2 3.72-.687 4.054 7.44 4.054 7.44-4.334 1.906-6.76-.084-6.76-.084z" fill="#F47741"/><path d="M45.204 44.292c-.508-.698-1.296-1.14-2.157-1.21-1.71-.176-7.56 1.126-7.56 1.126v.065c-.772-.205-5.98-1.6-7.56-1.45-.875.04-1.692.45-2.25 1.125-.446.864.084 2 .55 2.938.74 1.35 1.788 2.505 3.058 3.375.48.332 1.045.513 1.627.522 4.492.084 4.77-2.585 4.77-2.464l.075-.465c.186 0-.363 2.79 4.054 2.79.542.102 1.1.073 1.628-.084 1.305-.853 2.39-2 3.17-3.35.41-.92 1.043-1.96.596-2.918z" fill="#EFA75B"/><path d="M31.963 50.968c-.197-.004-.358-.157-.372-.353-.018-.207.158-.378.364-.354 3.245-.26 3.505-2.156 3.608-2.25-.006-.19.183-.325.362-.26.193.01.35.16.363.354 0 .084 0 1.906 3.422 2 .192.008.348.16.362.353-.018.19-.172.34-.363.353-1.352.11-2.68-.4-3.61-1.386-.095-.096-.16-.22-.185-.353-.982 1.174-2.423 1.866-3.952 1.898z" fill="#151841"/><path d="M32.14 43.427c.186-.52 3.608.083 3.608.083s2.975-.688 3.422.084c-.05.288-.175.557-.363.78-.515-.056-1.037.004-1.525.178-.333.61-.488 1.304-.446 2-.222.394-.574.7-.995.864-.398-.112-.75-.354-.994-.688.047-.75-.146-1.496-.55-2.13-.27-.26-1.264.084-1.626-.083l-.53-1.088zm6.89.242c-.05.286-.175.556-.363.78-.503-.063-1.015-.012-1.497.148-.333.612-.487 1.305-.446 2-.222.394-.574.7-.995.864-.4-.112-.75-.354-.996-.688.053-.76-.14-1.515-.55-2.157-.268-.26-1.263.084-1.626-.084-.26-.23-.45-.53-.55-.864" fill="#CF4A27"/><path d="M35.748 47.853c-.587-.226-1.072-.655-1.367-1.21-.022-.634-.144-1.262-.362-1.86h-.567c-.31.073-.636.043-.93-.082-.35-.253-.61-.616-.734-1.03-.082-.17.006-.374.186-.43.172-.083.38 0 .447.177.056.278.215.524.445.69h.586c.37-.086.757-.023 1.08.175.413.585.634 1.284.632 2v.353c.185.177.4.32.632.428.22-.18.42-.382.595-.605-.004-.29.024-.58.083-.865.026-.48.22-.94.55-1.292.506-.235 1.07-.325 1.626-.26.077-.108.14-.227.185-.353-.038-.148.042-.3.186-.353.145-.11.352-.07.447.083.084.084.27.428-.446 1.21-.083.083-.185.176-.27.083-.422-.033-.848-.004-1.264.084-.215.502-.323 1.043-.316 1.59v.176c-.326.57-.824 1.023-1.422 1.293zm-7.198-14.04c-.788-.226-1.61-.314-2.427-.26-1.264 0-2.436.082-2.52.082h-.38v.354s.715 3.55 3.96 3.895c.693.006 1.385-.025 2.074-.093.27-.084 1.71-.428 1.71-.428-.025-1.56-.975-2.956-2.417-3.552zm.53 3.207c-.558.142-1.135.2-1.71.177-1.14-.075-2.16-.728-2.707-1.73-.247-.37-.432-.78-.548-1.21.455 0 1.18-.092 2.073-.175h.596c-.084.688-.242 2.464.483 2.334.725-.13.837-1.46.93-2.13h.112c.937.492 1.647 1.33 1.98 2.334-.388.176-.793.31-1.21.4zm18.365-2.864c-1.104-.145-2.215-.232-3.33-.26-.546-.01-1.093.05-1.626.176-1.166.483-2.08 1.425-2.53 2.604l-.158.79 1.795.623c.558.153 1.132.24 1.71.26h.28c3.245-.177 4.137-3.72 4.137-3.72l.084-.353zm-1.264 1.86c-.54 1.394-2.882 1.646-2.966 1.646-.517-.02-1.03-.11-1.525-.26-.186-.085-.633-.26-1.08-.43.374-.966 1.117-1.746 2.065-2.165 0 .68.158 1.953.81 2.083.65.13.613-1.535.566-2.26.934.005 1.865.064 2.79.177-.11.316-.473.65-.66 1.17z" fill="#151841"/><path d="M19.26 39.27c.535 1.362 1.56 2.473 2.874 3.115.534.312 1.204-.07 1.207-.69.002-.285-.15-.55-.397-.695-.918-.46-1.65-1.222-2.073-2.158-.344-.957-1.972-.52-1.61.428zm29.45 3.125c1.083-.59 2.01-1.428 2.706-2.446.3-.556-.112-1.228-.743-1.21-.293.007-.56.17-.698.428-.568.776-1.306 1.412-2.158 1.86-.394.23-.517.742-.27 1.125.263.376.773.482 1.163.242z" fill="#EFA75B" stroke-width="13"/><path d="M16.025 32.436c1.525-1.386 2.427-4.408 2.79-6.835-.084.354 2.613.43 4.138-1.208 1.078-1.125.446-2-.186-3.375-1.71-3.552-4.585-6.323-7.384-8.918-.716-.69-1.44-2.428-2.706-2-.995.353-.93 3.2-.716 4.073 1.09 7.448 4.065 18.263 4.065 18.263zm37.372-.78c-1.704-1.826-2.822-4.12-3.208-6.585 0 .354-2.614.354-4.056-1.29-.995-1.127-.362-1.86.363-3.117 1.86-3.198 4.863-5.718 7.746-8.136.81-.604 1.627-1.47 2.79-.93.994.428.715 2.334.548 3.115-1.083 5.72-2.48 11.376-4.183 16.943z" fill="#FFF"/><path d="M53.564 20.422c-1.98.51-4.138 1.636-5.105 3.487-.43-2.196 1.645-4.65 3.393-5.832.333-.21.312-.703-.037-.886-.162-.085-.357-.076-.512.022-2.157 1.562-4.417 4.5-3.784 7.188.076.262.354.41.614.325l-.075.28c-.085.603.93.864.994.26.446-2.158 2.706-3.376 4.77-3.897.372-.076.522-.526.27-.81-.133-.15-.342-.204-.53-.138zM17.457 18.06c-.55-.354-.995.428-.55.865 1.433 1.004 3.182 3.05 3.395 4.956-.93-1.86-3.05-2.975-5.105-3.486-.386-.005-.633.41-.445.747.042.076.103.14.176.184 2.073.52 4.324 1.73 4.77 3.896.106.328.5.46.78.26.273.192.653.06.745-.26.735-2.66-1.6-5.728-3.766-7.16z" fill="#F1662A"/></svg></span><p class="course-loading-overlay__message"><b class="course-loading-overlay__message-title">Loading…</b><br><span class="course-loading-overlay__message-text">Everything will be ready in few seconds</span></p></div></div><div class="course-layout__sidebar course-theory"><div class="course-theory__inner course-theory__inner--left-stub"><button class="course-theory__close icon-close icon-close--light" type="button">Close</button><ul class="course-tabs course-tabs--non-interactive course-layout__theory-heading js--theory-tabs"><li class="course-tabs__item course-tabs__item--external course-tab course-tab--centered"><span class="course-tab__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#icon-theory"></use></svg></span><span class="course-tab__title">Theory</span></li><li class="course-tabs__item course-tabs__item--internal course-tab course-tab--centered course-tab--active js--theory-tab__theory"><span class="course-tab__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#icon-theory"></use></svg></span><span class="course-tab__title">Theory</span></li><li class="course-tabs__item course-tabs__item--internal course-tab course-tab--centered js--theory-tab__comments"><span class="course-tab__icon"><svg aria-hidden="true" style="width: 16px; height: 16px; fill: #2e2c9c;"><use xlink:href="/img/sprites/up.svg#comment"></use></svg></span><span class="course-tab__title">Comments</span></li></ul><section class="course-theory__content"><div class="js--theory-pane__theory course-theory__content-inner"><h1 class="course-theory__content-heading">Average value</h1><div class="course-theory__content-text"><p>Excellent! Muffin can see how much the actual traffic is different from the planned one. Bu watching traffic using the method of unfaltering gaze is unscientific and inefficient. It is better to invoke dry statistics, which will help us understand what is going wrong in a non-obvious situation.</p><p>Now you need to add to the program the average number of visits for the observed period. If this value is below the recommended one, Muffin will have to think about increasing his traffic.</p><p>The average value is calculated using the formula: sum of all values divided by their number. Let’s calculate the average number of visits per day and log this value in the console.</p></div></div><div class="js--theory-pane__comments hidden course-theory__content-inner"><div class="course-theory__content-text"><h2 class="course-theory__content-heading">Comments</h2><div id="disqus_thread"></div><script>
/**
* RECOMMENDED CONFIGURATION VARIABLES: EDIT AND UNCOMMENT THE SECTION BELOW TO INSERT DYNAMIC VALUES FROM YOUR PLATFORM OR CMS.
* LEARN WHY DEFINING THESE VARIABLES IS IMPORTANT: https://disqus.com/admin/universalcode/#configuration-variables */
var disqus_config = function () {
this.page.url = "https://htmlacademy.org/courses/javascript-programming/arrays/average-value";
this.page.identifier = "task-94";
};
(function() { // DON'T EDIT BELOW THIS LINE
var d = document, s = d.createElement('script');
s.src = 'https://htmlacademy.disqus.com/embed.js';
s.setAttribute('data-timestamp', +new Date());
(d.head || d.body).appendChild(s);
})();
</script><noscript>Please enable JavaScript to view the <a href="https://disqus.com/?ref_noscript">comments powered by Disqus.</a></noscript></div></div></section><div class="course-theory__controls"><button class="button button--close" type="button">To the task</button></div></div></div><div class="course-layout__column course-layout__column--left"><ul class="js--course-tabs course-tabs course-layout__course-tabs"><li class="course-tabs__item course-tab js--editor-tab course-tabs__item--limited course-tabs__item--limited-large course-tab--active" data-editor="js"><span class="course-tab__title course-tab__title--indent"><span class="course-tab__title-part course-tab__title-part--active">script.js</span></span></li></ul><div class="course-layout__editors"><div class="js--editor course-editor course-layout__editor" id="" data-tab="js" data-split=""><span class="course-editor__label"><span class="course-editor__label-item">JavaScript</span></span><div class="course-editor__item" id="js-editor">var expectedUsers = 1000;
var firstDayUsers = 812;
var secondDayUsers = 1360;
var thirdDayUsers = 657;
// Drawing the traffic graph
muffin.plot(firstDayUsers, secondDayUsers, thirdDayUsers, expectedUsers);
</div></div></div><div class="course-editor-controls"><button class="course-editor-controls__item course-editor-controls__item--answer" type="button">Show the answer</button></div><div class="js--feedback course-unhappy"><button class="js--feedback-btn course-unhappy__button" type="button"><span class="sr-only">Complain</span><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#unhappy"></use></svg></button><div class="js--feedback-modal course-unhappy__modal course-unhappy__modal--step-one"><form method="POST" action="/courses/javascript-programming/arrays/average-value/signal" class="course-unhappy__form form"><input type="hidden" name="csrf_name" value="csrf69aec34fb65eb"><input type="hidden" name="csrf_value" value="7e5f4a927128ebc64612fb916d26f188"><p class="course-unhappy__text">What didn’t you like in this task?</p><div class="course-unhappy__slide"><div class="course-unhappy__wrap"><div class="course-unhappy__list"><label class="checkbox checkbox--small"><input class="checkbox__input" name="problems" value="1" type="checkbox"><span class="checkbox__text">The code check doesn’t work</span></label><label class="checkbox checkbox--small"><input class="checkbox__input" name="problems" value="2" type="checkbox"><span class="checkbox__text">The task is too difficult</span></label><label class="checkbox checkbox--small"><input class="checkbox__input" name="problems" value="3" type="checkbox"><span class="checkbox__text">The theory is hard to understand</span></label><label class="checkbox checkbox--small"><input class="js--feedback-other-checkbox checkbox__input" name="problems" value="0" type="checkbox"><span class="checkbox__text">Other (will write below)</span></label></div><div class="course-unhappy__message"><label class="sr-only" for="id-message">Другое (сейчас напишу)</label><textarea class="field field--area" id="id-message" name="message" placeholder="For example, a typo in the word «heading»"></textarea></div></div></div><button class="course-unhappy__control course-unhappy__control--prev" type="button"><span class="sr-only">Prev</span><svg aria-hidden="true"><use xlink:href="/img/sprites/landings.svg#arrow"></use></svg></button><button class="course-unhappy__control course-unhappy__control--next" type="button" disabled><span class="sr-only">Next</span><svg aria-hidden="true"><use xlink:href="/img/sprites/landings.svg#arrow"></use></svg></button><button class="js--submit-btn button" disabled>Submit</button></form><p class="course-unhappy__result hidden">Thanks! We’ll fix everything at once!</p></div></div></div><div class="course-layout__column course-layout__column--right"><span class="course-separator-control"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#icon-arrows-separator"></use></svg></span><div class="course-browser"><div class="course-browser__menu"><span class="course-browser__menu-item course-browser__address"><span class="course-browser__menu-item-inner">Console</span></span><button class="js--autorun course-browser__menu-item course-browser__menu-button course-browser__menu-button--text-with-icon course-browser__menu-button--autorun course-browser__menu-button--autorun-on" title="Autorun" type="button"><span class="course-browser__menu-item-inner"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#icon-autorun"></use></svg>
Autorun
</span></button><button class="course-browser__menu-item course-browser__menu-button course-browser__menu-button--expand" type="button"><svg xmlns="http://www.w3.org/2000/svg" width="11" height="11" viewBox="0 0 11 11"><path d="M1.375 5.125v4.5h4.5m3.75-3.75v-4.5h-4.5" fill="none" fill-rule="evenodd" stroke="currentColor"></path></svg></button></div><div class="course-browser__notification js--browser-change-heading hidden"><p class="course-browser__notification-text">The code has changed, click “Run” or turn autorun on.</p><button class="course-browser__notification-button course-browser__notification-button--play js--close" type="button"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#icon-play"></use></svg>
Run</button></div><div class="course-browser__content"><div class="console js--console"><h2 class="sr-only">Result</h2><div class="console__content js--console__content"></div></div></div><div class="course-goals js--goals"><div class="course-goals__heading"><span class="course-goals__heading-title"><span class="course-goals__count-label">Goals</span><span class="course-goals__count">completed</span></span><button class="course-goals__button course-goals__button--expand js--goals__expand" type="button"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#icon-collapse"></use></svg></button><a class="course-goals__button course-goals__button--next button button--green button--without-border hidden" href="/courses/javascript-programming/arrays/analizer-almost-ready" title="Finishing the traffic analyzer"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#arrow-white--mini"></use></svg></a></div><div class="course-goals__content"><p>Calculate the average site traffic.</p><ol class="course-goals__list"><li class="course-goals__list-item">Add declaration of the variable <code>averageUsers</code> to the end of the program.</li><li class="course-goals__list-item">And assign it a value calculated using the formula <code>(firstDayUsers + secondDayUsers + thirdDayUsers) / 3</code><span class="mark">.</span></li><li class="course-goals__list-item">Then log the variable <code>averageUsers</code> in the console.</li></ol></div></div></div></div></article></div><div class="course-interface__overlay course-interface__overlay--active"></div></main><script
src="https://assets.htmlacademy.org/scripts/courses-spa/htmlacademy-task.v43.js"
data-task-type="js"
data-assets-path="https://assets.htmlacademy.org/scripts/courses-spa/"
data-lang="en"
></script><script>HtmlacademyTask.setRoutes({task:'/courses/javascript-programming/arrays/average-value',check:'/courses/javascript-programming/arrays/average-value/check'});</script><script>HtmlacademyTask.setup(function(){this.setView(JsView),this.setRunner(JsRunner),this.setChecker(JsChecker,function(){this.setMatcher(function(a){a.goal("add.variable").code('"#builtin.anything"; var averageUsers = "#builtin.anything"; "#builtin.anything"').goal("initialize.variable").code('"#builtin.anything"; "#set.variable.value"; "#builtin.anything"').goal("log.variable").code('"#builtin.anything"; console.log(averageUsers); "#builtin.anything"').fragment("medium.expression").code("(firstDayUsers + secondDayUsers + thirdDayUsers) / 3").fragment("set.variable.value").code('var averageUsers = "#medium.expression"','var averageUsers; averageUsers = "#medium.expression"')}),this.addGoal("add.variable"),this.addGoal("initialize.variable"),this.addGoal("log.variable")}),this.setAnswers([{goal:1,editor:"js",data:function(){this.tooltip("Add a variable").at(8).add("\nvar averageUsers;\n")}},{goal:2,editor:"js",data:function(){this.tooltip("Calculate average traffic").at(9,16).add(" = (firstDayUsers + secondDayUsers + thirdDayUsers) / 3")}},{goal:3,editor:"js",data:function(){this.tooltip("Log the value in the console").at(10).add("console.log(averageUsers);\n")}}])});</script><footer class="page-footer page-footer--tiny"><div class="page-footer__inner"><p><a href="/docs/cookies">Cookies</a> ∙
<a href="/docs/privacy">Privacy</a> ∙
<a href="/docs/agreement">License Agreement</a> ∙
<a href="/docs/about">About</a> ∙
<a href="/contacts">Contacts</a> ∙
© HTML Academy OÜ, 2019−2026
</p><div class="page-footer__financial"><img src="https://assets.htmlacademy.org/img/visa-white.svg?cs=96e54ec8c587db9d4b1d8d328ffd87c2ebfd9555" alt="VISA" title="VISA" width="35" height="35"><img src="https://assets.htmlacademy.org/img/mastercard-horizontal.v2.svg" alt="Mastercard" title="Mastercard" width="35" height="35"></div></div></footer><div class="modal"><div class="modal__inner"><div class="modal__wrapper js-login hidden"><button class="modal__close icon-close" type="button" title="Close" data-modal="close"></button><h4 class="modal__header">Log in</h4><ul class="modal__social"><li class="modal__social-link modal__social-link--fb"><a href="/login/fb?redirect_url=%2Fcourses%2Fjavascript-programming%2Farrays%2Faverage-value" rel="nofollow" title="Log in via Facebook"><svg aria-hidden="true"><use xlink:href="/img/sprites/general.svg#facebook"></use></svg></a></li><li class="modal__social-link modal__social-link--google"><a href="/login/google?redirect_url=%2Fcourses%2Fjavascript-programming%2Farrays%2Faverage-value" rel="nofollow" title="Log in via Google"><svg height="30" width="30" viewBox="0 0 512 512" xmlns="http://www.w3.org/2000/svg"><path fill="#ffffff" d="M457.732 216.625c2.628 14.041 4.063 28.743 4.063 44.098C461.796 380.688 381.481 466 260.204 466c-116.023 0-210-93.977-210-210s93.977-210 210-210c56.704 0 104.077 20.867 140.44 54.73l-59.204 59.197v-.135c-22.046-21.002-50-31.762-81.236-31.762-69.297 0-125.604 58.537-125.604 127.841 0 69.29 56.306 127.968 125.604 127.968 62.87 0 105.653-35.965 114.46-85.312h-114.46v-81.902h197.528z"/></svg></a></li></ul><div class="modal__or"><span>or</span></div><form class="modal__form form" action="/login?redirect_url=%2Fcourses%2Fjavascript-programming%2Farrays%2Faverage-value" autocomplete="off" method="post" data-submit="o"><input type="hidden" name="csrf_name" value="csrf69aec34fb65eb"><input type="hidden" name="csrf_value" value="7e5f4a927128ebc64612fb916d26f188"><div class="form__group"><label class="sr-only" for="login-email">Email</label><input class="field field--text field--full-width" type="email" name="email" placeholder="Email" value="" id="login-email"></div><div class="form__group"><label class="sr-only" for="login-password">Password</label><input class="field field--text field--full-width ym-disable-keys" type="password" name="password" placeholder="Password" id="login-password"></div><input class="button button--full-width" type="submit" data-submit-text="Logging in…" value="Log in"></form><p class="modal__forgot-password"><a href="/recover" data-modal="open" data-value="recover">Forgot your password?</a></p><a class="modal__bottom-link" href="/signup" data-modal="open" data-value="register">Sign up</a></div><div class="modal__wrapper js-register hidden"><button class="modal__close icon-close" type="button" title="Close" data-modal="close"></button><h4 class="modal__header">Sign up</h4><ul class="modal__social"><li class="modal__social-link modal__social-link--fb"><a href="/login/fb?redirect_url=%2Fcourses%2Fjavascript-programming%2Farrays%2Faverage-value" rel="nofollow" title="Log in via Facebook"><svg aria-hidden="true"><use xlink:href="/img/sprites/general.svg#facebook"></use></svg></a></li><li class="modal__social-link modal__social-link--google"><a href="/login/google?redirect_url=%2Fcourses%2Fjavascript-programming%2Farrays%2Faverage-value" rel="nofollow" title="Log in via Google"><svg height="30" width="30" viewBox="0 0 512 512" xmlns="http://www.w3.org/2000/svg"><path fill="#ffffff" d="M457.732 216.625c2.628 14.041 4.063 28.743 4.063 44.098C461.796 380.688 381.481 466 260.204 466c-116.023 0-210-93.977-210-210s93.977-210 210-210c56.704 0 104.077 20.867 140.44 54.73l-59.204 59.197v-.135c-22.046-21.002-50-31.762-81.236-31.762-69.297 0-125.604 58.537-125.604 127.841 0 69.29 56.306 127.968 125.604 127.968 62.87 0 105.653-35.965 114.46-85.312h-114.46v-81.902h197.528z"/></svg></a></li></ul><div class="modal__or"><span>or</span></div><form class="modal__form form" action="/signup?redirect_url=%2Fcourses%2Fjavascript-programming%2Farrays%2Faverage-value" autocomplete="off" method="post"><input type="hidden" name="csrf_name" value="csrf69aec34fb65eb"><input type="hidden" name="csrf_value" value="7e5f4a927128ebc64612fb916d26f188"><div class="form__group"><label class="sr-only" for="email">
Email
<span class="required"><span class="sr-only">Required field</span><span class="required__star">*</span></span></label><div class="form__group-fields"><input class="field field--text field--full-width" type="email" name="email" value="" id="email" required placeholder="Email"></div></div><div class="form__group"><label class="sr-only" for="password">
Password
<span class="required"><span class="sr-only">Required field</span><span class="required__star">*</span></span></label><div class="form__group-fields"><input class="field field--text field--full-width" type="password" name="password" value="" id="password" required placeholder="Password"></div></div><div class="form__group"><label class="checkbox"><input class="checkbox__input" type="checkbox" name="agreement" value="1" required><span class="checkbox__text"><span>By signing up, you agree to our <a href="/docs/agreement" target="_blank">License Agreement</a> and <a href="/docs/privacy" target="_blank">Privacy Policy</a>.</span></span></label></div><input class="button button--full-width" type="submit" data-submit-text="Signing up…" value="Sign up"></form><a class="modal__bottom-link" href="/login?redirect_url=%2Fcourses%2Fjavascript-programming%2Farrays%2Faverage-value" data-modal="open" data-value="login">Log in</a></div><div class="modal__wrapper modal__wrapper--no-btn-bottom js-recover hidden"><button class="modal__close icon-close" type="button" title="Close" data-modal="close"></button><h4 class="modal__header">Restore access</h4><p class="modal__text-accent">Have you forgotten your password or lost access to your profile? Enter your email connected to your profile and we will send you a link to restore access.</p><form class="modal__form form" action="/recover" autocomplete="off" method="post" data-submit="o"><input type="hidden" name="csrf_name" value="csrf69aec34fb65eb"><input type="hidden" name="csrf_value" value="7e5f4a927128ebc64612fb916d26f188"><div class="form__group"><label class="sr-only" for="recovery-email">Email</label><input class="field field--text field--full-width" type="email" name="email" placeholder="Email" value="" id="recovery-email"></div><script src='https://www.google.com/recaptcha/api.js'></script><div class="form__group"><div class="g-recaptcha" data-sitekey="6LetCTEqAAAAANROWtPzfC7Rfg9iIRiRt2k2FPn7"></div></div><input class="button button--full-width" type="submit" data-submit-text="Sending…" value="Send"></form><p class="modal__text">Forgot to connect your email to the profile? Email us and we’ll help.</p></div></div></div><script async src="https://assets.htmlacademy.org/js/general.v274.js" data-assets="https://assets.htmlacademy.org" data-require="toggle,navigation-courses,modal,form,nav"></script></body></html>