For MD Arman

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Counter Loop</title>
</head>
<body>
    <script>
        var count = 1;
        for(var i=0; i<=20; i++){
            count++;
        }
        document.write(count);
    </script>
</body>
</html>