10 lines
271 B
Markdown
10 lines
271 B
Markdown
### Average of array of numbers
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Use `reduce()` to add each value to an accumulator, initialized with a value of `0`, divide by the `length` of the array.
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```js
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const average = arr =>
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arr.reduce( (acc , val) => acc + val, 0) / arr.length;
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// average([1,2,3]) -> 2
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```
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