Rewrite solution with reduce()
const addArr = (arr) => { if(arr.length === 0) {return null } return arr.reduce((prev,curr) => prev + curr, 0) };- const addArr = (arr) => {
let sum = 0;for (let i = 0; i < arr.length; i++) {sum += arr[i];}return sum || null;- if(arr.length === 0) {return null }
- return arr.reduce((prev,curr) => prev + curr, 0)
- };