JavaScript
console.log('Brekkie-meter v0.1 is launched');
var milkInGrams = muffin.ask('Boss, how many grams of milk have you had?');
console.log('Brekkie-meter has received milk data. ' + milkInGrams + ' grams consumed.');
Thanks! We’ll fix everything at once!
Result
- Declare variable breakfastCalories,
- use it to save the result calculated with the formula described in the theory section.
- Log in the console a message made up of three fragments: string 'Calorific value of breakfast: ', variable breakfastCalories, line ' calories, boss!'.
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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">Release of Brekkie-meter v0.1, part 2</h1><div class="course-theory__content-text"><p>Great. Now we need to process the data and show the result to the boss.</p><p>Let’s agree on the formula for calculating the caloric value. We know how many grams of milk Muffin drinks. We’ve also learned that he now drinks fatter milk containing 50 calories per 100 grams.</p><p>To calculate the total number of calories, we need to multiply the number of grams by the number of calories per gram (we need to divide 50 by 100 first). Here is the final formula:</p><pre><code>numberOfGramsVariable * 50 / 100</code></pre><p>Let’s save the result to another variable and send a message to the console. The task is solved, all we need is to write code now!</p><p>You are now ready for writing your own program from scratch all on your own. You will do it the next task. You will get the technical specification from Muffin (it will also explain where the boss got the idea of keeping track of his calories). He will also personally test your program. Don’t worry, the task is simple enough.</p><p>Final tip. When you start writing your code from scratch, you might need additional variables. Remember, there are several variable naming rules:</p><ul><li>Variable names are case-sensitive in JavaScript. <code>myname</code> and <code>myName</code> are two different variables.</li><li>The name of a variable must start with a Latin letter and can contain Latin letters and numbers only.</li><li>You cannot use special reserved words, such as <code>var</code> or <code>if</code> as variable names. Here is a <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Lexical_grammar#Keywords" target="_blank" rel="nofollow noopener">complete list</a> of these reserved words.</li></ul></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>
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</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">console.log('Brekkie-meter v0.1 is launched');
var milkInGrams = muffin.ask('Boss, how many grams of milk have you had?');
console.log('Brekkie-meter has received milk data. ' + milkInGrams + ' grams consumed.');
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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/intro/summary" title="Summary of “Getting to know JavaScript”"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#arrow-white--mini"></use></svg></a></div><div class="course-goals__content"><ol class="course-goals__list"><li class="course-goals__list-item">Declare variable <code>breakfastCalories</code><span class="mark">,</span></li><li class="course-goals__list-item">use it to save the result calculated with the formula described in the theory section.</li><li class="course-goals__list-item">Log in the console a message made up of three fragments: string <code>'Calorific value of breakfast: '</code>, variable <code>breakfastCalories</code>, line <code>' calories, boss!'</code><span class="mark">.</span></li></ol></div></div></div></div></article></div><div class="course-interface__overlay course-interface__overlay--active"></div></main><script
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