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","creator":{"public_name":"Илья Родионов","id":776847,"is_tutor":false},"comments":[{"creator":{"public_name":"Maksim Litvinov","id":198906,"is_tutor":true},"id":188345,"body":"Илья, перейдите к упражнению в этом уроке. Там в панели справа есть кнопка Памятка. Нажмите ее, там рассказывается, как работать с редактором в упражнении","topic_id":97364}],"communitable":{"parent_entity_name":null,"parent_entity_url":null,"entity_name":"Hello, World!","entity_url":null,"active":true}},{"id":82253,"title":"Hello World","plain_title":"Hello World ","creator":{"public_name":"Dmitrijs","id":580617,"is_tutor":false},"comments":[{"creator":{"public_name":"Maksim Litvinov","id":198906,"is_tutor":true},"id":167651,"body":"Добрый день! Добро пожаловать на Хекслет! Подскажите, у вас возник какой-то вопрос по упражнению?","topic_id":82253}],"communitable":{"parent_entity_name":null,"parent_entity_url":null,"entity_name":"Hello, World!","entity_url":null,"active":true}},{"id":83631,"title":"Курс «Основы JavaScript», Урок Hello, World!\nhttps://ru.hexlet.io/courses/js-basics/lessons/hello-world/exercise_unit\nЗдравствуйте! \nНе пойму что не так, я все перепробовала. Помогите! :)\n","plain_title":"Курс «Основы JavaScript», Урок Hello, World! https://ru.hexlet.io/courses/js-basics/lessons/hello-world/exercise_unit Здравствуйте! Не пойму что не так, я все перепробовала. Помогите! :) ","creator":{"public_name":"","id":593950,"is_tutor":false},"comments":[{"creator":{"public_name":"Максим Матиенко (2107о)","id":521254,"is_tutor":false},"id":169654,"body":"просто скопируйте строчку из рид ми\n","topic_id":83631},{"creator":{"public_name":"","id":593950,"is_tutor":false},"id":169660,"body":"не помогло))","topic_id":83631},{"creator":{"public_name":"Максим Матиенко (2107о)","id":521254,"is_tutor":false},"id":169661,"body":"скиньте ревью кода,нажмите сохранить код и там откроется ссылка,киньте сюда\n","topic_id":83631},{"creator":{"public_name":"","id":593950,"is_tutor":false},"id":169666,"body":"спасибо! я разобралась. Я не там писала)))","topic_id":83631},{"creator":{"public_name":"","id":593950,"is_tutor":false},"id":169659,"body":"было))","topic_id":83631}],"communitable":{"parent_entity_name":null,"parent_entity_url":null,"entity_name":"Hello, World!","entity_url":null,"active":true}},{"id":86454,"title":"user-4b1eef2068e579a5\nЧто не так? console.log('Hello, World!');","plain_title":"user-4b1eef2068e579a5 Что не так? console.log('Hello, World!'); ","creator":{"public_name":"Тоня","id":625933,"is_tutor":false},"comments":[{"creator":{"public_name":"Maksim Litvinov","id":198906,"is_tutor":true},"id":173778,"body":"Добрый день! Попробуйте скопировать ваше решение и нажмите кнопку Сброс, чтобы вернуть упражнение в исходную форму. Затем вставьте решение между BEGIN и END и еще раз запустите проверку","topic_id":86454}],"communitable":{"parent_entity_name":null,"parent_entity_url":null,"entity_name":"Hello, World!","entity_url":null,"active":true}},{"id":96121,"title":"Я один считаю, что комментарии являются частью программы, но не являются частью исполняемого кода?","plain_title":"Я один считаю, что комментарии являются частью программы, но не являются частью исполняемого кода? ","creator":{"public_name":"Никита","id":754070,"is_tutor":false},"comments":[{"creator":{"public_name":"Ivan Gagarinov","id":75907,"is_tutor":true},"id":186913,"body":"**Никита**, здравствуйте. Думаю вы не один, кто так думает.[ У нас есть комьюнити в телеграм](https://t.me/hexletcommunity), вы можете задать этот вопрос там. Скорее всего так вы получите больше ответов на свой вопрос.","topic_id":96121}],"communitable":{"parent_entity_name":null,"parent_entity_url":null,"entity_name":"Hello, World!","entity_url":null,"active":true}},{"id":69948,"title":"Простите за вопрос - но учиться JS можно в том же CodePen и VisualSC?","plain_title":"Простите за вопрос - но учиться JS можно в том же CodePen и VisualSC? ","creator":{"public_name":"Алексей Поспелов","id":431398,"is_tutor":false},"comments":[{"creator":{"public_name":"Roman Ashikov","id":226258,"is_tutor":true},"id":146366,"body":"Учиться JavaScript можно на Хекслете! Это ведь как раз курс по самым основам JS. А в упражнениях уже полностью готовое настроенное окружение для обучения и можно сразу же писать код. На настройку локального окружения может уйти очень много времени даже у опытного программиста. Настраивать всё локально мы учимся далее в программе в курсе по [Настройке окружения](https://ru.hexlet.io/courses/js-setup-environment) и продолжаем практиковаться, выполняя проекты.\n\nВ качестве вспомогательных инструментов можно использовать CodePen (который вы упомянули) и [replit](https://replit.com). А VSCode это удобный редактор кода, его тоже используют, чтобы учиться и писать код на JavaScript.","topic_id":69948},{"creator":{"public_name":"Алексей Поспелов","id":431398,"is_tutor":false},"id":146518,"body":"**Roman Ashikov**, спасибо!","topic_id":69948}],"communitable":{"parent_entity_name":null,"parent_entity_url":null,"entity_name":"Hello, World!","entity_url":null,"active":true}},{"id":75994,"title":"console.log('Hello,World!');\nГде тут ошибка? Почему не пропускает тест?","plain_title":"console.log('Hello,World!'); Где тут ошибка? Почему не пропускает тест? ","creator":{"public_name":"Василь","id":524812,"is_tutor":false},"comments":[{"creator":{"public_name":"Aleksandr Litvinov","id":117182,"is_tutor":true},"id":158341,"body":"**Василь**, вам правильно подсказывают :) удалось решить упражнение?","topic_id":75994},{"creator":{"public_name":"Максим","id":507526,"is_tutor":false},"id":158183,"body":"У Вас не хватает пробела между запятой и World.","topic_id":75994}],"communitable":{"parent_entity_name":null,"parent_entity_url":null,"entity_name":"Hello, World!","entity_url":null,"active":true}},{"id":74354,"title":"console.log('Hello, World!');","plain_title":"console.log('Hello, World!'); ","creator":{"public_name":"","id":511568,"is_tutor":false},"comments":[{"creator":{"public_name":"Ivan Gagarinov","id":75907,"is_tutor":true},"id":155066,"body":"**user-06b92ed6bd378b4a**, здравствуйте! Подскажите, у вас есть какой-то вопрос по уроку? Вы написали верное решение, но его нужно ввести в редакторе упражнения.","topic_id":74354},{"creator":{"public_name":"","id":584762,"is_tutor":false},"id":169015,"body":"**Ivan Gagarinov**, где редактор упражнений ???\n","topic_id":74354}],"communitable":{"parent_entity_name":null,"parent_entity_url":null,"entity_name":"Hello, World!","entity_url":null,"active":true}},{"id":75636,"title":"console.log (\"aslakak\")\n","plain_title":"console.log (\"aslakak\") ","creator":{"public_name":"","id":523330,"is_tutor":false},"comments":[{"creator":{"public_name":"Maksim Litvinov","id":198906,"is_tutor":true},"id":157618,"body":"Добрый день! Подскажите, у вас возникли какие-то вопросы по этому уроку?","topic_id":75636}],"communitable":{"parent_entity_name":null,"parent_entity_url":null,"entity_name":"Hello, World!","entity_url":null,"active":true}},{"id":83798,"title":"Привет. Что такое дистрибутив?","plain_title":"Привет. Что такое дистрибутив? ","creator":{"public_name":"","id":596896,"is_tutor":false},"comments":[{"creator":{"public_name":"Roman Ashikov","id":226258,"is_tutor":true},"id":169904,"body":"Приветствую!\n\nВ общем виде, это комплект готового к распространению программного обеспечения. Если говорить о Linux, то это операционная система готовая для установки на компьютер пользователя. Дистрибутив, как правило, включает в себя набор утилит, библиотек, различных программ, графическую подсистему и т.д. ","topic_id":83798},{"creator":{"public_name":"","id":596896,"is_tutor":false},"id":169905,"body":"Спасибо","topic_id":83798}],"communitable":{"parent_entity_name":null,"parent_entity_url":null,"entity_name":"Hello, World!","entity_url":null,"active":true}}],"lesson":{"exercise":{"id":1871,"slug":"js_basics_hello_world_exercise","name":null,"state":"active","kind":"exercise","language":"javascript","locale":"ru","has_web_view":false,"has_test_view":false,"reviewable":true,"readme":"## solution.js\n\nНаберите в редакторе код из примера ниже символ в символ и нажмите «▶».\n\n```javascript\nconsole.log('Hello, World!')\n```\n\nВнимание: если вы напишете `heLLo, woRld!` вместо `Hello, World!`, то это будет считаться другим текстом, потому что заглавные и строчные буквы — это разные символы. Размер буквы называют _регистром_, и говорят: _регистр — важен!_ Это касается почти всего в коде, поэтому привыкайте всегда обращать внимание на регистр.\n","prepared_readme":"## solution.js\n\nНаберите в редакторе код из примера ниже символ в символ и нажмите «▶».\n\n```javascript\nconsole.log('Hello, World!')\n```\n\nВнимание: если вы напишете `heLLo, woRld!` вместо `Hello, World!`, то это будет считаться другим текстом, потому что заглавные и строчные буквы — это разные символы. Размер буквы называют _регистром_, и говорят: _регистр — важен!_ Это касается почти всего в коде, поэтому привыкайте всегда обращать внимание на регистр.\n","has_solution":true,"entity_name":"Hello, World!"},"units":[{"id":5935,"name":"theory","url":"/courses/js-basics/lessons/hello-world/theory_unit"},{"id":5936,"name":"quiz","url":"/courses/js-basics/lessons/hello-world/quiz_unit"},{"id":6014,"name":"exercise","url":"/courses/js-basics/lessons/hello-world/exercise_unit"}],"links":[{"id":428869,"name":"Немного о Hello, World!","url":"https://ru.hexlet.io/blog/posts/moy-chelovek-menya-ponimaet-istoriya-frazy-hello-world-i-ee-analogov\n"}],"ordered_units":[{"id":5935,"name":"theory","url":"/courses/js-basics/lessons/hello-world/theory_unit"},{"id":5936,"name":"quiz","url":"/courses/js-basics/lessons/hello-world/quiz_unit"},{"id":6014,"name":"exercise","url":"/courses/js-basics/lessons/hello-world/exercise_unit"}],"id":2607,"slug":"hello-world","state":"approved","name":"Hello, World!","course_order":110,"goal":"Пишем первую программу","self_study":null,"theory_video_provider":null,"theory_video_uid":null,"theory":"По традиции начнем с написания программы «Hello, World!». Эта программа будет выводить на экран текст. Чтобы вывести что-то на экран, нужно дать компьютеру специальную команду. В языке JavaScript такая команда — `console.log()`:\n\n\n\n```javascript\nconsole.log('Hello, World!')\n// => Hello, World!\n```\n\nИногда для удобства мы будем показывать в комментариях результат запуска строчек кода, вот так: `=> РЕЗУЛЬТАТ`. Например, `// => 4`.\n\n## Комментарии\n\nКроме собственного кода в файлах с исходным кодом могут находиться комментарии. Это текст, который не является частью программы и нужен программистам для пометок. С их помощью добавляют пояснения, как работает код, какие здесь ошибки нужно поправить или не забыть что-то добавить позже.\n\n```javascript\n// Удалить строку ниже после реализации задачи по регистрации\nconsole.log(10)\n```\n\nКомментарии в JavaScript бывают двух видов.\n\n_Однострочные комментарии_ начинаются с `//`. После этих двух символов может следовать любой текст, вся строка не будет анализироваться и исполняться. Комментарий может занимать всю строку. Если одной строки мало, то создаются несколько комментариев:\n\n```javascript\n// For Winterfell!\n// For Lanisters!\n```\n\nКомментарий может находиться на строке после какого-нибудь кода:\n\n```javascript\nconsole.log('I am the King') // For Lannisters!\n```\n\n_Многострочные комментарии_ начинаются с `/*` и заканчиваются `*/`.\n\n```javascript\n/*\n The night is dark and\n full of terrors.\n*/\nconsole.log('I am the King')\n```\n\nТакие комментарии обычно используют для документирования кода, например, функций.\n"},"lessonMember":null,"courseMember":null,"course":{"start_lesson":{"exercise":null,"units":[{"id":5934,"name":"theory","url":"/courses/js-basics/lessons/intro/theory_unit"}],"links":[{"id":428865,"name":"Профессия Фронтенд-разработчик","url":"https://ru.hexlet.io/programs/frontend"},{"id":428866,"name":"Профессия Node.js-разработчик","url":"https://ru.hexlet.io/programs/backend"},{"id":428867,"name":"Профессия Fullstack-разработчик","url":"https://ru.hexlet.io/programs/fullstack-javascript"},{"id":428868,"name":"Дискретная математика","url":"https://ru.hexlet.io/programs/discrete-mathematics"}],"ordered_units":[{"id":5934,"name":"theory","url":"/courses/js-basics/lessons/intro/theory_unit"}],"id":2606,"slug":"intro","state":"approved","name":"Введение","course_order":100,"goal":"Знакомимся с курсом","self_study":null,"theory_video_provider":null,"theory_video_uid":null,"theory":"JavaScript — один из самых широко используемых языков. Он применяется в разработке игр, создании Web-приложений. Именно с этого курса начинается погружение в сам язык.\n\nВ курсе даются основы программирования на JavaScript. Мы познакомимся с такими понятиями как представление данных в памяти, стандарты именования, кодирование строк и многими другими. Изучение основ программирования с самого нуля требует особого способа организации учебного материала. Необходимо первичное привыкание к языковым конструкциям, погружение в язык.\n\n## Цели курса\n\n* Изучить основы синтаксиса языка JavaScript\n* Научиться писать небольшие программы\n* Познакомиться с отладкой и научиться эффективно ее выполнять\n* Научиться работать в среде Хекслета, разобраться со структурой практических заданий\n* Изучить механизмы, позволяющие работать с многофайловыми проектами\n\nМы также закрепим на практике все, что было изучено. Каждый урок курса заканчивается упражнением, а после курса вас ждет множество дополнительных заданий, которые желательно выполнить до перехода на следующий курс. Эти задания охватывают сразу весь материал курса и помогают наработать необходимую практику для дальнейшего продвижения по профессии.\n"},"id":271,"slug":"js-basics","challenges_count":8,"name":"Основы JavaScript","allow_indexing":true,"state":"approved","course_state":"finished","pricing_type":"free","description":"На этом курсе вы изучите основы JavaScript — одного из самых широко используемых языков.\n\nНа курсе вы познакомитесь с экосистемой JavaScript, ключевыми возможностями языка, а также узнаете о чистых функциях и именовании. В итоге обучения вы начнете использовать и определять функции, писать несложные программы, искать и анализировать ошибки в коде.\n\nИзучение основ программирования на JavaScript с самого нуля требует особого способа организации учебного материала. Поэтому во время обучения вы будете не только изучать новые темы, но и отработаете свои навыки, привыкните к языковым конструкциям.\n\nЗнания из этого курса помогут начать погружение в программирование на JavaScript, получить основное представление о языке JavaScript, его принципах и особенностях.","kind":"basic","updated_at":"2026-02-25T11:48:16.972Z","language":"javascript","duration_cache":179640,"skills":["Создавать программы, используя основные конструкции языка (условия, циклы, функции и другие)","Составлять программы, состоящие из нескольких модулей","Правильно анализировать ошибки в коде и пользоваться отладочной печатью при их 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__m__-_R_rdub_"><style data-mantine-styles="inline">.__m__-_R_6qrdub_{margin-top:0rem;padding-inline:var(--mantine-spacing-xs);width:100%;}@media(min-width: 48em){.__m__-_R_6qrdub_{margin-top:var(--mantine-spacing-xl);width:80%;}}@media(min-width: 62em){.__m__-_R_6qrdub_{padding-inline:var(--mantine-spacing-xl);}}</style><div style="margin-inline:auto;max-width:var(--mantine-breakpoint-xl)" class="__m__-_R_6qrdub_"><div style="color:var(--mantine-color-dimmed)" class="m_4451eb3a mantine-Center-root" data-inline="true"><div style="--ti-size:var(--ti-size-xs);--ti-bg:transparent;--ti-color:var(--mantine-color-indigo-light-color);--ti-bd:calc(0.0625rem * var(--mantine-scale)) solid transparent;margin-inline-end:calc(0.125rem * var(--mantine-scale));color:inherit" class="m_7341320d mantine-ThemeIcon-root" data-variant="transparent" data-size="xs"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="tabler-icon tabler-icon-lock "><path d="M5 13a2 2 0 0 1 2 -2h10a2 2 0 0 1 2 2v6a2 2 0 0 1 -2 2h-10a2 2 0 0 1 -2 -2v-6"></path><path d="M11 16a1 1 0 1 0 2 0a1 1 0 0 0 -2 0"></path><path d="M8 11v-4a4 4 0 1 1 8 0v4"></path></svg></div><p style="font-size:var(--mantine-font-size-sm)" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">Основы JavaScript</p></div><h1 style="--title-fw:var(--mantine-h1-font-weight);--title-lh:var(--mantine-h1-line-height);--title-fz:var(--mantine-h1-font-size);margin-bottom:var(--mantine-spacing-xl)" class="m_8a5d1357 mantine-Title-root" data-order="1">Теория: Hello, World!</h1><script type="application/ld+json">{"@context":"https://schema.org","@type":"LearningResource","name":"Hello, World!","inLanguage":"ru","isPartOf":{"@type":"LearningResource","name":"Основы JavaScript"},"isAccessibleForFree":"False","hasPart":{"@type":"WebPageElement","isAccessibleForFree":"False","cssSelector":".paywalled"}}</script><div class=""><div style="--alert-color:var(--mantine-color-indigo-light-color);margin-bottom:var(--mantine-spacing-lg);font-size:var(--mantine-font-size-lg)" class="m_66836ed3 mantine-Alert-root" id="mantine-_R_remqrdub_" role="alert" aria-describedby="mantine-_R_remqrdub_-body" aria-labelledby="mantine-_R_remqrdub_-title"><div class="m_a5d60502 mantine-Alert-wrapper"><div class="m_667f2a6a mantine-Alert-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="tabler-icon tabler-icon-rocket "><path d="M4 13a8 8 0 0 1 7 7a6 6 0 0 0 3 -5a9 9 0 0 0 6 -8a3 3 0 0 0 -3 -3a9 9 0 0 0 -8 6a6 6 0 0 0 -5 3"></path><path d="M7 14a6 6 0 0 0 -3 6a6 6 0 0 0 6 -3"></path><path d="M14 9a1 1 0 1 0 2 0a1 1 0 1 0 -2 0"></path></svg></div><div class="m_667c2793 mantine-Alert-body"><div class="m_6a03f287 mantine-Alert-title"><span id="mantine-_R_remqrdub_-title" class="m_698f4f23 mantine-Alert-label">Полный доступ к материалам</span></div><div id="mantine-_R_remqrdub_-body" class="m_7fa78076 mantine-Alert-message"><div style="--group-gap:var(--mantine-spacing-md);--group-align:center;--group-justify:space-between;--group-wrap:wrap" class="m_4081bf90 mantine-Group-root"><p class="mantine-focus-auto m_b6d8b162 mantine-Text-root">Зарегистрируйтесь и получите доступ к этому и десяткам других курсов</p><a style="--button-height:var(--button-height-xs);--button-padding-x:var(--button-padding-x-xs);--button-fz:var(--mantine-font-size-xs);--button-bg:linear-gradient(45deg, var(--mantine-color-blue-filled) 0%, var(--mantine-color-cyan-filled) 100%);--button-hover:linear-gradient(45deg, var(--mantine-color-blue-filled) 0%, var(--mantine-color-cyan-filled) 100%);--button-color:var(--mantine-color-white);--button-bd:none" class="mantine-focus-auto mantine-active m_77c9d27d mantine-Button-root m_87cf2631 mantine-UnstyledButton-root" data-variant="gradient" data-size="xs" href="/u/new"><span class="m_80f1301b mantine-Button-inner"><span class="m_811560b9 mantine-Button-label">Зарегистрироваться</span></span></a></div></div></div></div></div><div class="paywalled m_d08caa0 mantine-Typography-root"><p>По традиции начнем с написания программы «Hello, World!». Эта программа будет выводить на экран текст. Чтобы вывести что-то на экран, нужно дать компьютеру специальную команду. В языке JavaScript такая команда — <code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">console.log()</code>:</p>
<p><img style="--image-object-fit:contain;width:auto" class="m_9e117634 mantine-Image-root" src="/rails/active_storage/blobs/proxy/eyJfcmFpbHMiOnsiZGF0YSI6MTU2NzAsInB1ciI6ImJsb2JfaWQifX0=--e75fed886cd9d94887721925e62c6f1d917a2a56/hello-world.png" alt="Hello World" loading="lazy"/></p>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">console.log('Hello, World!')
// => Hello, World!</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<p>Иногда для удобства мы будем показывать в комментариях результат запуска строчек кода, вот так: <code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">=> РЕЗУЛЬТАТ</code>. Например, <code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">// => 4</code>.</p>
<h2 id="heading-2-1">Комментарии</h2>
<p>Кроме собственного кода в файлах с исходным кодом могут находиться комментарии. Это текст, который не является частью программы и нужен программистам для пометок. С их помощью добавляют пояснения, как работает код, какие здесь ошибки нужно поправить или не забыть что-то добавить позже.</p>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">// Удалить строку ниже после реализации задачи по регистрации
console.log(10)</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<p>Комментарии в JavaScript бывают двух видов.</p>
<p><em>Однострочные комментарии</em> начинаются с <code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">//</code>. После этих двух символов может следовать любой текст, вся строка не будет анализироваться и исполняться. Комментарий может занимать всю строку. Если одной строки мало, то создаются несколько комментариев:</p>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">// For Winterfell!
// For Lanisters!</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<p>Комментарий может находиться на строке после какого-нибудь кода:</p>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">console.log('I am the King') // For Lannisters!</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<p><em>Многострочные комментарии</em> начинаются с <code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">/*</code> и заканчиваются <code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">*/</code>.</p>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">/*
The night is dark and
full of terrors.
*/
console.log('I am the King')</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<p>Такие комментарии обычно используют для документирования кода, например, функций.</p></div><div style="margin-block:var(--mantine-spacing-xl)" class=""><h2 style="--title-fw:var(--mantine-h2-font-weight);--title-lh:var(--mantine-h2-line-height);--title-fz:var(--mantine-h2-font-size);margin-bottom:var(--mantine-spacing-md)" class="m_8a5d1357 mantine-Title-root" data-order="2">Рекомендуемые программы</h2><style data-mantine-styles="inline">.__m__-_R_2mremqrdub_{--carousel-slide-gap:var(--mantine-spacing-xs);--carousel-slide-size:70%;}@media(min-width: 36em){.__m__-_R_2mremqrdub_{--carousel-slide-gap:var(--mantine-spacing-xl);--carousel-slide-size:50%;}}</style><div style="--carousel-control-size:calc(2.5rem * var(--mantine-scale));--carousel-controls-offset:var(--mantine-spacing-sm);margin-bottom:var(--mantine-spacing-lg);padding-block:var(--mantine-spacing-sm);background:var(--app-color-surface)" class="m_17884d0f mantine-Carousel-root responsiveClassName" data-orientation="horizontal" data-include-gap-in-size="true"><div class="m_39bc3463 mantine-Carousel-controls" data-orientation="horizontal"><button class="mantine-focus-auto m_64f58e10 mantine-Carousel-control m_87cf2631 mantine-UnstyledButton-root" type="button" data-inactive="true" data-type="previous" tabindex="-1"><svg viewBox="0 0 15 15" fill="none" xmlns="http://www.w3.org/2000/svg" style="transform:rotate(90deg);width:calc(1rem * var(--mantine-scale));height:calc(1rem * var(--mantine-scale));display:block"><path d="M3.13523 6.15803C3.3241 5.95657 3.64052 5.94637 3.84197 6.13523L7.5 9.56464L11.158 6.13523C11.3595 5.94637 11.6759 5.95657 11.8648 6.15803C12.0536 6.35949 12.0434 6.67591 11.842 6.86477L7.84197 10.6148C7.64964 10.7951 7.35036 10.7951 7.15803 10.6148L3.15803 6.86477C2.95657 6.67591 2.94637 6.35949 3.13523 6.15803Z" fill="currentColor" fill-rule="evenodd" clip-rule="evenodd"></path></svg></button><button class="mantine-focus-auto m_64f58e10 mantine-Carousel-control m_87cf2631 mantine-UnstyledButton-root" type="button" data-inactive="true" data-type="next" tabindex="-1"><svg viewBox="0 0 15 15" fill="none" xmlns="http://www.w3.org/2000/svg" style="transform:rotate(-90deg);width:calc(1rem * var(--mantine-scale));height:calc(1rem * var(--mantine-scale));display:block"><path d="M3.13523 6.15803C3.3241 5.95657 3.64052 5.94637 3.84197 6.13523L7.5 9.56464L11.158 6.13523C11.3595 5.94637 11.6759 5.95657 11.8648 6.15803C12.0536 6.35949 12.0434 6.67591 11.842 6.86477L7.84197 10.6148C7.64964 10.7951 7.35036 10.7951 7.15803 10.6148L3.15803 6.86477C2.95657 6.67591 2.94637 6.35949 3.13523 6.15803Z" fill="currentColor" fill-rule="evenodd" clip-rule="evenodd"></path></svg></button></div><div class="m_a2dae653 mantine-Carousel-viewport" data-type="media"><div class="m_fcd81474 mantine-Carousel-container __m__-_R_2mremqrdub_" data-orientation="horizontal"><div class="m_d98df724 mantine-Carousel-slide" data-orientation="horizontal"><div tabindex="0" style="cursor:pointer;height:100%"><a style="text-decoration:none" class="mantine-focus-auto m_849cf0da m_b6d8b162 mantine-Text-root mantine-Anchor-root" data-underline="hover" href="/programs/frontend?promo_name=programs_list&promo_position=course&promo_creative=catalog_card&promo_type=card" target="_blank"><div style="height:100%" class="m_e615b15f mantine-Card-root m_1b7284a3 mantine-Paper-root" data-with-border="true"><div style="--group-gap:calc(0.25rem * var(--mantine-scale));--group-align:center;--group-justify:flex-start;--group-wrap:nowrap" class="m_4081bf90 mantine-Group-root"><span style="font-size:var(--mantine-font-size-sm)" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">10 месяцев</span><span class="mantine-focus-auto m_b6d8b162 mantine-Text-root">·</span><span style="font-size:var(--mantine-font-size-sm)" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">С нуля</span></div><p 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style="cursor:pointer;height:100%"><a style="text-decoration:none" class="mantine-focus-auto m_849cf0da m_b6d8b162 mantine-Text-root mantine-Anchor-root" data-underline="hover" href="/programs/fullstack-javascript?promo_name=programs_list&promo_position=course&promo_creative=catalog_card&promo_type=card" target="_blank"><div style="height:100%" class="m_e615b15f mantine-Card-root m_1b7284a3 mantine-Paper-root" data-with-border="true"><div style="--group-gap:calc(0.25rem * var(--mantine-scale));--group-align:center;--group-justify:flex-start;--group-wrap:nowrap" class="m_4081bf90 mantine-Group-root"><span style="font-size:var(--mantine-font-size-sm)" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">12 месяцев</span><span class="mantine-focus-auto m_b6d8b162 mantine-Text-root">·</span><span style="font-size:var(--mantine-font-size-sm)" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">С нуля</span></div><p 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data-with-border="true"><div style="--group-gap:calc(0.25rem * var(--mantine-scale));--group-align:center;--group-justify:flex-start;--group-wrap:nowrap" class="m_4081bf90 mantine-Group-root"><span style="font-size:var(--mantine-font-size-sm)" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">6 месяцев</span><span class="mantine-focus-auto m_b6d8b162 mantine-Text-root">·</span><span style="font-size:var(--mantine-font-size-sm)" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">Для продвинутых</span></div><p style="margin-bottom:var(--mantine-spacing-sm);font-size:var(--mantine-font-size-h5);font-weight:bold" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">Автоматизатор тестирования на JavaScript</p><p class="mantine-focus-auto m_b6d8b162 mantine-Text-root">Изучите: Git, JavaScript, Playwright, юнит-, API- и UI-тесты, Docker и SQL</p><div style="margin-top:auto" class=""><div class="m_4451eb3a mantine-Center-root"><img style="opacity:0.8;width:70%" class="m_9e117634 mantine-Image-root mantine-visible-from-xs" src="https://hexlet.io/rails/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6Mzk0MSwicHVyIjoiYmxvYl9pZCJ9fQ==--9a9cd0863661374e7c92ea27b1270ac3299c0979/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJ3ZWJwIiwicmVzaXplX3RvX2xpbWl0IjpbNDAwLDQwMF0sInNhdmVyIjp7InF1YWxpdHkiOjg1fX0sInB1ciI6InZhcmlhdGlvbiJ9fQ==--5b6f46dacd1af664f27558553a58076185091823/Usability%20testing-pana.png" alt="Автоматизатор тестирования на JavaScript" loading="eager"/></div><div style="--group-gap:var(--mantine-spacing-md);--group-align:end;--group-justify:space-between;--group-wrap:wrap;margin-top:var(--mantine-spacing-xs)" class="m_4081bf90 mantine-Group-root"><p style="font-size:var(--mantine-font-size-xl)" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">от 4 281 ₽</p><p style="font-size:var(--mantine-font-size-sm)" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">Посмотреть →</p></div></div></div></a></div></div><div class="m_d98df724 mantine-Carousel-slide" data-orientation="horizontal"><div tabindex="0" style="cursor:pointer;height:100%"><a style="text-decoration:none" class="mantine-focus-auto m_849cf0da m_b6d8b162 mantine-Text-root mantine-Anchor-root" data-underline="hover" href="/programs/web-development-free?promo_name=programs_list&promo_position=course&promo_creative=catalog_card&promo_type=card" target="_blank"><div style="height:100%" class="m_e615b15f mantine-Card-root m_1b7284a3 mantine-Paper-root" data-with-border="true"><div style="--group-gap:calc(0.25rem * var(--mantine-scale));--group-align:center;--group-justify:flex-start;--group-wrap:nowrap" class="m_4081bf90 mantine-Group-root"><span style="font-size:var(--mantine-font-size-sm)" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">1 месяц</span><span class="mantine-focus-auto m_b6d8b162 mantine-Text-root">·</span><span style="font-size:var(--mantine-font-size-sm)" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">С нуля</span></div><p 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