HTML
<!DOCTYPE html>
<html lang="en-US">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>Add internal JS to HTML</title>
</head>
<body>
<h1>Demo: Add internal JavaScript to HTML</h1>
<!-- JavaScript code begins here -->
<script>
document.write("Example to demonstrate the Internal JavaScript")
</script>
</body>
</html>