74 lines
1.8 KiB
Markdown
74 lines
1.8 KiB
Markdown
---
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id: 56533eb9ac21ba0edf2244ae
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title: Finding a Remainder in JavaScript
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challengeType: 1
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videoUrl: 'https://scrimba.com/c/cWP24Ub'
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---
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## Description
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<section id='description'>
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The <dfn>remainder</dfn> operator <code>%</code> gives the remainder of the division of two numbers.
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<strong>Example</strong>
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<blockquote>5 % 2 = 1 because<br>Math.floor(5 / 2) = 2 (Quotient)<br>2 * 2 = 4<br>5 - 4 = 1 (Remainder)</blockquote>
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<strong>Usage</strong><br>In mathematics, a number can be checked to be even or odd by checking the remainder of the division of the number by <code>2</code>.
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<blockquote>17 % 2 = 1 (17 is Odd)<br>48 % 2 = 0 (48 is Even)</blockquote>
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<strong>Note</strong><br>The <dfn>remainder</dfn> operator is sometimes incorrectly referred to as the "modulus" operator. It is very similar to modulus, but does not work properly with negative numbers.
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</section>
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## Instructions
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<section id='instructions'>
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Set <code>remainder</code> equal to the remainder of <code>11</code> divided by <code>3</code> using the <dfn>remainder</dfn> (<code>%</code>) operator.
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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: The variable <code>remainder</code> should be initialized
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testString: assert(/var\s+?remainder/.test(code));
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- text: The value of <code>remainder</code> should be <code>2</code>
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testString: assert(remainder === 2);
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- text: You should use the <code>%</code> operator
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testString: assert(/\s+?remainder\s*?=\s*?.*%.*;/.test(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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// Only change code below this line
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var remainder;
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```
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</div>
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### After Test
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<div id='js-teardown'>
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```js
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(function(y){return 'remainder = '+y;})(remainder);
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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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var remainder = 11 % 3;
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```
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</section>
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