77 lines
2.7 KiB
Markdown
77 lines
2.7 KiB
Markdown
---
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title: Happy numbers
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id: 594810f028c0303b75339ad1
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challengeType: 5
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videoUrl: ''
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localeTitle: 快乐的数字
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---
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## Description
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<section id="description"><p>幸福的数字由以下过程定义： </p><p>从任何正整数开始，将数字替换为其数字的平方和，并重复该过程直到数字等于1（它将保持不变），或者它在一个不包括1的循环中无休止地循环。这些数字这个过程在1结束的是幸福的数字，而那些不以1结尾的数字是不愉快的数字。 </p><p>实现一个函数，如果数字是满意的，则返回true，否则返回false。 </p></section>
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## Instructions
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<section id="instructions">
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: <code>happy</code>是一种功能。
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testString: 'assert(typeof happy === "function", "<code>happy</code> is a function.");'
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- text: <code>happy(1)</code>应该返回一个布尔值。
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testString: 'assert(typeof happy(1) === "boolean", "<code>happy(1)</code> should return a boolean.");'
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- text: <code>happy(1)</code>应该回归真实。
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testString: 'assert(happy(1), "<code>happy(1)</code> should return true.");'
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- text: <code>happy(2)</code>应该返回虚假。
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testString: 'assert(!happy(2), "<code>happy(2)</code> should return false.");'
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- text: <code>happy(7)</code>应该回归真实。
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testString: 'assert(happy(7), "<code>happy(7)</code> should return true.");'
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- text: <code>happy(10)</code>应该回归真实。
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testString: 'assert(happy(10), "<code>happy(10)</code> should return true.");'
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- text: <code>happy(13)</code>应该回归真实。
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testString: 'assert(happy(13), "<code>happy(13)</code> should return true.");'
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- text: <code>happy(19)</code>应该回归真实。
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testString: 'assert(happy(19), "<code>happy(19)</code> should return true.");'
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- text: <code>happy(23)</code>应该回归真实。
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testString: 'assert(happy(23), "<code>happy(23)</code> should return true.");'
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- text: <code>happy(28)</code>应该回归真实。
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testString: 'assert(happy(28), "<code>happy(28)</code> should return true.");'
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- text: <code>happy(31)</code>应该回归真实。
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testString: 'assert(happy(31), "<code>happy(31)</code> should return true.");'
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- text: <code>happy(32)</code>应该回归真实：
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testString: 'assert(happy(32), "<code>happy(32)</code> should return true:.");'
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- text: <code>happy(33)</code>应该返回虚假。
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testString: 'assert(!happy(33), "<code>happy(33)</code> should return false.");'
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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function happy (number) {
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// Good luck!
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}
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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// solution required
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```
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</section>
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