X
HOME HTML CSS JAVASCRIPT SQL PHP JQUERY ANGULAR XML ASP.NET MORE...
REFERENCES | EXAMPLES | FORUM | ABOUT

JavaScript Number() Function

Function Reference JavaScript Global Functions

Example

Convert different object values to their numbers:

var x1 = true;
var x2 = false;
var x3 = new Date();
var x4 = "999";
var x5 = "999 888";

var n =
Number(x1) + "<br>" +
Number(x2) + "<br>" +
Number(x3) + "<br>" +
Number(x4) + "<br>" +
Number(x5);

The result of n will be:

1
0
1382704503079
999
NaN

Try it yourself »


Definition and Usage

The Number() function converts the object argument to a number that represents the object's value.

If the value cannot be converted to a legal number, NaN is returned.

Note: If the parameter is a Date object, the Number() function returns the number of milliseconds since midnight January 1, 1970 UTC.


Browser Support

Internet Explorer Firefox Opera Google Chrome Safari

The Number() function is supported in all major browsers.


Syntax

Number(object)

Parameter Values

Parameter Description
object Optional. A JavaScript object. If no argument is provided, it returns 0.

Return Value

Type Description
Number Returns different object values to their numbers. If the value cannot be converted to a legal number, NaN is returned. If no argument is provided, it returns 0.

Technical Details

JavaScript Version: 1.1


Function Reference JavaScript Global Functions

Your suggestion:

Close [X]

Thank You For Helping Us!

Your message has been sent to W3Schools.

Close [X]
Search w3schools.com:

WEB HOSTING

UK Reseller Hosting

WEB BUILDING

Download XML Editor FREE Website BUILDER Free HTML5 Templates FREE Website Templates Free HTML Templates

SHARE THIS PAGE

facebook