# JavaScript Number() Function

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

Function |  |  |  |  |
--- | --- | --- | --- | --- | ---
Number() | Yes | Yes | Yes | Yes | Yes

## Syntax

Number(object)

## Parameter Values

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

## Technical Details

Return Value: | A 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.
JavaScript Version: | 1.1

JavaScript Global Functions

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