[Js] 합계 구할때 for문보다 reduce를 쓰자

1. 합계 : for문

let numbers = [1,2,3,4];
const size = numbers.length;
let sum = 0;
for(let i=0;i<size;i++){
    sum += numbers[i];
}
sum;

 

2. 합계 : reduce

let numbers = [1,2,3,4];
const size = numbers.length;
let sum = numbers.reduce((prev, cur) => prev + cur);
sum;