68 lines
2.3 KiB
Markdown
68 lines
2.3 KiB
Markdown
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---
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title: Iterated digits squaring
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id: 5a23c84252665b21eecc7ec1
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challengeType: 5
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videoUrl: ''
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localeTitle: 迭代的数字平方
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---
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## Description
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<section id="description">如果添加自然数（大于零的整数）的数字的平方，则始终以1或89结尾： <pre> 15 - > 26 - > 40 - > 16 - > 37 - > 58 - > 89
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7 - > 49 - > 97 - > 130 - > 10 - > 1 </pre>编写一个函数，该函数将数字作为参数，并在执行上述过程后返回1或89。 </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>iteratedSquare</code>应该是一个函数。
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testString: 'assert(typeof iteratedSquare=="function","<code>iteratedSquare</code> should be a function.");'
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- text: <code>iteratedSquare(4)</code>应该返回一个数字。
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testString: 'assert(typeof iteratedSquare(4)=="number","<code>iteratedSquare(4)</code> should return a number.");'
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- text: <code>iteratedSquare(4)</code>应该返回<code>89</code> 。
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testString: 'assert.equal(iteratedSquare(4),89,"<code>iteratedSquare(4)</code> should return <code>89</code>.");'
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- text: <code>iteratedSquare(7)</code>应该返回<code>1</code> 。
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testString: 'assert.equal(iteratedSquare(7),1,"<code>iteratedSquare(7)</code> should return <code>1</code>.");'
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- text: <code>iteratedSquare(15)</code>应该返回<code>89</code> 。
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testString: 'assert.equal(iteratedSquare(15),89,"<code>iteratedSquare(15)</code> should return <code>89</code>.");'
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- text: <code>iteratedSquare(20)</code>应该返回<code>89</code> 。
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testString: 'assert.equal(iteratedSquare(20),89,"<code>iteratedSquare(20)</code> should return <code>89</code>.");'
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- text: <code>iteratedSquare(70)</code>应该返回<code>1</code> 。
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testString: 'assert.equal(iteratedSquare(70),1,"<code>iteratedSquare(70)</code> should return <code>1</code>.");'
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- text: <code>iteratedSquare(100)</code>应该返回<code>1</code> 。
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testString: 'assert.equal(iteratedSquare(100),1,"<code>iteratedSquare(100)</code> should return <code>1</code>.");'
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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 iteratedSquare (n) {
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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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