(PCC)::[How-to-use-Single-line-comments-at-the-end-of-a-line-in-JavaScript]::[js]
<!DOCTYPE html>
<html>
<body>
<h2>JavaScript Comments</h2>
<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
// Write y to demo:
document.getElementById("demo").innerHTML = y;
</script>
</body>
</html>