JSFiddle - React, Tailwind, and code Playground

JavaScript

var arr = [10, 20, 30, 40, 50];
var result = 0;

for(var i = 0; i < arr.length; i++) {
  console.log(result, '+', arr[i], '=',  result + arr[i]);
  result+=arr[i];
}
console.log('합계는 ',result);