javascript mean of array code example

Example 1: how to calculate average of array in javascript

const arrAvg = arr => arr.reduce((a,b) => a + b, 0) / arr.length

Example 2: javascript average of arguments

const average = (...args) => args.reduce((a, b) => a + b) / args.length;

// Example
average(1, 2, 3, 4);    // 2.5