Javascript has introduced Number() method to convert a value into a number. This method can convert number strings to numbers and boolean values to 1's or 0's. Let's discuss it briefly.
syntax
var num = Number(value);
Example-1
In the following example, Number() method has converted number strings and boolean values to numbers and displayed the output as shown.
<html>
<body>
<script>
document.write(Number("10.5") + "</br>");
document.write(Number(" 123 ") + "</br>");
document.write(Number(true) + "</br>");
document.write(Number(false) + "</br>");
document.write(Number(null));
</script>
</body>
</html>Output
10.5 123 1 0 0
Example-2
This method not only converts a normal value to a number but also converts a hexadecimal value to a number as shown below.
<html>
<body>
<script>
document.write(Number(" ") + "<br>");
document.write(Number("") + "<br>");
document.write(Number("123e-1") + "<br>");
document.write(Number("0xFF") + "<br>");
</script>
</body>
</html>Output
0 0 12.3 255