Answers for "math.sum in javascript"

sum of all numbers in an array javascript

const arrSum = arr => arr.reduce((a,b) => a + b, 0)

js sum of array

[1, 2, 3, 4].reduce((a, b) => a + b, 0)

// Output: 10

summation js

const summation = (n) => (n * (n + 1)) / 2;

sum function in javascript

let sum = (...para) => para.reduce((d,b) => d + b);