JSFiddle - React, Tailwind, and code Playground

by frogggeee McFrogggeee

HTML

<!DOCTYPE html>
<html>
<head>
<h1>number comma puter</h1>
<p>by frogggeee</p>
<button onclick = "number()" >click me</button>
<body>
<script>
function number() {
  let number = prompt("type in a number");
  let numberWithCommas = "";
  let noc = (number.length / 3);
  let thenumber = [];
  let i = 0;
  noc = Math.trunc((number.length - 1) / 3);
  for (i = 0;i < number.length;i++) {
    thenumber.push(number.charAt(i));
  } 
  let place = 3;
  for (i = 0;i < noc;i++) {
    thenumber.splice((number.length - place), 0, ",");
    place += 3;
  }
  let thing = 0;
  for (i = 0;i < thenumber.length;i++) {
    numberWithCommas = numberWithCommas + (thenumber[thing]);
    thing++;
  }
  alert (numberWithCommas);
}
</script>
</body>
</head>
</html>