<!DOCTYPE html>
<html lang="en-US">
<body>
<h1>JS Factorial of a Number</h1>
<script>
var num = 6;
var i = 1;
var factorial = 1;
for(i=1; i <= num; i++)
factorial *= i;
if(num)
document.write("Factorial of "+num+": "+factorial);
else
document.write("Factorial of 0: 0");
</script>
</body>
</html>