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78 lines
1.4 KiB
Markdown
78 lines
1.4 KiB
Markdown
---
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id: 56533eb9ac21ba0edf2244ae
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title: 求余运算
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challengeType: 1
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videoUrl: 'https://scrimba.com/c/cWP24Ub'
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forumTopicId: 18184
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dashedName: finding-a-remainder-in-javascript
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---
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# --description--
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<dfn>remainder</dfn> 求余运算符 `%` 返回两个数相除得到的余数
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**示例**
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<pre>
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5 % 2 = 1
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5 / 2 = 2 remainder 1
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2 * 2 = 4
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5 - 4 = 1
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</pre>
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**Usage**
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In mathematics, a number can be checked to be even or odd by checking the remainder of the division of the number by `2`. Even numbers have a remainder of `0`, while odd numbers a remainder of `1`.
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<pre>
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17 % 2 = 1
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48 % 2 = 0
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</pre>
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**提示**余数运算符（<dfn>remainder</dfn>）有时被错误地称为“模数”运算符。 它与模数非常相似，但不能用于负数的运算。
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# --instructions--
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使用 <dfn>remainder</dfn> （`%`）运算符，计算 `11` 除以 `3` 的余数，并把余数赋给变量 `remainder`。
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# --hints--
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变量 `remainder` 应该被初始化。
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```js
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assert(/(const|let|var)\s+?remainder/.test(code));
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```
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`remainder` 的值应该等于 `2`。
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```js
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assert(remainder === 2);
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```
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你应该使用 `%` 运算符。
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```js
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assert(/\s+?remainder\s*?=\s*?.*%.*;?/.test(code));
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```
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# --seed--
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## --after-user-code--
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```js
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(function (y) {
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return 'remainder = ' + y;
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})(remainder);
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```
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## --seed-contents--
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```js
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const remainder = 0;
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```
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# --solutions--
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```js
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const remainder = 11 % 3;
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```
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