<!DOCTYPE html>
<html lang="en-US">
<body>
<h1>JS Find All Prime Numbers</h1>
<script>
var start = 1;
var end = 20;
var count = 0;
var i = 1;
document.write("The prime numbers between "+start+" to "+end+":<br>");
for(start = start; start <= end; start++)
{
for(i=1; i <= start; i++)
{
if(start % i == 0)
count++;
}
if(count == 2)
document.write(start +" ");
count = 0;
}
</script>
</body>
</html>