JavaScript end line comments
<html>
<body>
<script type="text/javascript">
document.write("Hello"); // Write "Hello"
document.write(" Mahbub!"); // Write " Mahbub!"
</script>
</body>
</html>
<body>
<script type="text/javascript">
document.write("Hello"); // Write "Hello"
document.write(" Mahbub!"); // Write " Mahbub!"
</script>
</body>
</html>
Result
