Learn JavaScript Part 5: Number() Function

Number function converts object value to number.

Learn<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title></title>
</head>
<body>
    <script id="javascript">
    var value=prompt("what is your age?","");
    alert(value+7);

    var num= Number(value);
    alert(num+7);
    </script>
</body>
</html>