chore(learn): Applied MDX format to Chinese curriculum files (#40462)

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Randell Dawson
2020-12-16 00:37:30 -07:00
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1665 changed files with 58741 additions and 88042 deletions

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---
id: 597b2b2a2702b44414742771
title: 阶乘
challengeType: 5
videoUrl: ''
title: 阶乘
---
## Description
<section id="description"><p>编写一个函数来返回一个数字的阶乘。 </p><p>一个数字的因子由下式给出: </p> N = n *n-1*n-2* ..... * 1 <p>例如3 = 3 * 2 * 1 = 6 4 = 4 * 3 * 2 * 1 = 24 </p><p>注意0 = 1 </p></section>
# --description--
## Instructions
<section id="instructions">
</section>
<p>编写一个函数来返回一个数字的阶乘。 </p><p>一个数字的因子由下式给出: </p> N = n \*n-1\*n-2\* ..... \* 1 <p>例如3 = 3 * 2 * 1 = 6 4 = 4 * 3 * 2 * 1 = 24 </p><p>注意0 = 1 </p>
## Tests
<section id='tests'>
# --hints--
```yml
tests:
- text: <code>factorial</code>是一种功能。
testString: assert(typeof factorial === 'function');
- text: <code>factorial(2)</code>应该返回一个数字。
testString: assert(typeof factorial(2) === 'number');
- text: <code>factorial(3)</code>应该返回6.“)
testString: assert.equal(factorial(3), 6);
- text: <code>factorial(3)</code>应返回120.“)
testString: assert.equal(factorial(5), 120);
- text: '<code>factorial(3)</code>应返回3,628,800。“'
testString: assert.equal(factorial(10), 3628800);
```
</section>
## Challenge Seed
<section id='challengeSeed'>
<div id='js-seed'>
`factorial`是一种功能。
```js
function factorial (n) {
// Good luck!
}
assert(typeof factorial === 'function');
```
</div>
### After Test
<div id='js-teardown'>
`factorial(2)`应该返回一个数字。
```js
console.info('after the test');
assert(typeof factorial(2) === 'number');
```
</div>
</section>
## Solution
<section id='solution'>
`factorial(3)`应该返回6.“)
```js
// solution required
assert.equal(factorial(3), 6);
```
/section>
`factorial(3)`应返回120.“)
```js
assert.equal(factorial(5), 120);
```
`factorial(3)`应返回3,628,800。“
```js
assert.equal(factorial(10), 3628800);
```
# --solutions--