data-type-boolean.html

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Data Type : Number</title>
</head>

<body>
    <script>
        document.writeln("<br>" + "Boolean : " + true);
        document.writeln("<br>" + "Boolean : " + false);
    </script>
</body>

</html>