const addArr = (arr) => { return arr.length === 0 ? null : arr.reduce((value, num) => { return value += num },0) };
- const addArr = (arr) => {
let sum = 0;for (let i = 0; i < arr.length; i++) {sum += arr[i];}return sum || null;- return arr.length === 0 ? null : arr.reduce((value, num) => {
- return value += num
- },0)
- };