22 lines
514 B
Markdown
22 lines
514 B
Markdown
---
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title: Random element in array
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tags: array,string,random
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cover: paper-card
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firstSeen: 2017-12-17T16:41:31+02:00
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lastUpdated: 2020-10-22T20:24:30+03:00
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---
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Gets a random element from an array.
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- Use `Math.random()` to generate a random number.
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- Multiply it by `Array.prototype.length` and round it off to the nearest whole number using `Math.floor()`.
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- This method also works with strings.
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```js
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const sample = arr => arr[Math.floor(Math.random() * arr.length)];
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```
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```js
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sample([3, 7, 9, 11]); // 9
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```
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