[JS] 숫자배열의 합 구하기

forEach

const num10 = [1,2,3,4,5,6,7,8,9,10];
let sum = 0;
num10.forEach((i) => {
  sum += i;
});
console.log(sum);  //55

reduce

const num10 = [1,2,3,4,5,6,7,8,9,10];
const sum = num10.reduce((a,b) => (a+b));
console.log(sum);  //55