JSFiddle - React, Tailwind, and code Playground

by Jay Lim

HTML

<ul id="results"></ul>

JavaScript

(function simpleSample(){
 var idx = 0, sum = 0;
 for(var i = 1; i <= 10; i++){
  for(var j = 1; j <= i; j++){
   idx++;
   sum += j;
   var li = document.createElement('li');
   li.textContent = 'idx(반복횟수) = ' + idx + ', sum(누적합계) = ' + sum;
   document.getElementById('results').appendChild(li);
  }
 }
})();