<!DOCTYPE html>
<html>
<body>
<p id="demo"></p>
<script>
var x = 5; // Declare x, give it the value of 5
var y = x + 2; // Declare y, give it the value of x + 2
document.getElementById("demo").innerHTML = y; // Write y to demo
</script>
<p><strong>Note:</strong> The comments are not executed.</p>
</body>
</html>