add avg method to Array.prototype code example
Example 1: how to calculate average of array in javascript
const arrAvg = arr => arr.reduce((a,b) => a + b, 0) / arr.lengthExample 2: sum all elements in array javascript
arr.reduce((a, b) => a + b)const arrAvg = arr => arr.reduce((a,b) => a + b, 0) / arr.lengtharr.reduce((a, b) => a + b)