24 lines
536 B
Markdown
24 lines
536 B
Markdown
---
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title: Average of numbers
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tags: math,array
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expertise: beginner
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cover: blog_images/interior-8.jpg
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firstSeen: 2017-12-29T13:29:49+02:00
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lastUpdated: 2020-10-22T20:23:47+03:00
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---
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Calculates the average of two or more numbers.
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- Use `Array.prototype.reduce()` to add each value to an accumulator, initialized with a value of `0`.
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- Divide the resulting array by its length.
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```js
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const average = (...nums) =>
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nums.reduce((acc, val) => acc + val, 0) / nums.length;
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```
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```js
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average(...[1, 2, 3]); // 2
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average(1, 2, 3); // 2
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```
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