chore(i18n,learn): processed translations (#44866)

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camperbot
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---
id: 597b2b2a2702b44414742771
title: Factorial
title: 階乗
challengeType: 5
forumTopicId: 302263
dashedName: factorial
@ -8,49 +8,49 @@ dashedName: factorial
# --description--
Write a function to return the factorial of a number.
数字の階乗を返す関数を作成します。
Factorial of a number is given by:
数値の階乗は次のようになります。
<pre><big>n! = n * (n-1) * (n-2) * ..... * 1</big>
</pre>
For example:
:
<ul>
<li><code>3! = 3 * 2 * 1 = 6</code></li>
<li><code>4! = 4 * 3 * 2 * 1 = 24</code></li>
</ul>
**Note:** `0! = 1`
**注記:** `0! = 1`
# --hints--
`factorial` should be a function.
`factorial` という関数です。
```js
assert(typeof factorial === 'function');
```
`factorial(2)` should return a number.
`factorial(2)` は数字を返します。
```js
assert(typeof factorial(2) === 'number');
```
`factorial(3)` should return 6.
`factorial(3)` は6を返します。
```js
assert.equal(factorial(3), 6);
```
`factorial(5)` should return 120.
`factorial(5)` は120を返します。
```js
assert.equal(factorial(5), 120);
```
`factorial(10)` should return 3,628,800.
`factorial(10)` 3,628,800を返します。
```js
assert.equal(factorial(10), 3628800);