Answers for "sum function in js using array unlimited number"

sum of all numbers in an array javascript

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

how to get sum array in javascript

let sub1 = (arr) => arr.reduce( (x,y) => x+y);

console.log(sub1([2, 4, 9]));
console.log(sub1([15, 200, 18, 0, 18, 18]));
console.log(sub1([100, 4, 17, 29, 81]));