20 lines
404 B
Markdown
20 lines
404 B
Markdown
---
|
|
title: average
|
|
tags: math,array,beginner
|
|
---
|
|
|
|
Calculates the average of two or more numbers.
|
|
|
|
- Use `Array.prototype.reduce()` to add each value to an accumulator, initialized with a value of `0`.
|
|
- Divide the resulting array by its length.
|
|
|
|
```js
|
|
const average = (...nums) =>
|
|
nums.reduce((acc, val) => acc + val, 0) / nums.length;
|
|
```
|
|
|
|
```js
|
|
average(...[1, 2, 3]); // 2
|
|
average(1, 2, 3); // 2
|
|
```
|