Number Task 3

by fredericklim

HTML

<!DOCTYPE html>
<html>
<body>

<p id="output"></p>

<script>
"use strict";

let num;

function readNumber() {
	do {
  	num = prompt("Input number:");
    console.log(num);
    console.log("isNaN: " + isNaN(num));
    console.log("isFinite: " + isFinite(num));
  } while( isNaN(num) );
  
  if (num === null || num === "") return null;

	return +num;
}

document.querySelector("#output").innerHTML = `Number is: ${readNumber()}`;

</script>

</body>
</html>