JavaScript Number() Function
 Complete Function Reference
Definition and Usage
The Number() function converts the value of an object to a number.
Syntax
| Parameter |
Description |
| object |
Required. A JavaScript object |
Tips and Notes
Note: If the parameter is a Date object, the Number() function returns the
number of milliseconds since midnight January 1, 1970 UTC.
Note: If the object's value cannot be converted to a number, the Number()
function returns NaN.
Example
In this example we will try to convert different objects to numbers:
<script type="text/javascript">
var test1= new Boolean(true);
var test2= new Boolean(false);
var test3= new Date();
var test4= new String("999");
var test5= new String("999 888");
document.write(Number(test1)+ "<br />");
document.write(Number(test2)+ "<br />");
document.write(Number(test3)+ "<br />");
document.write(Number(test4)+ "<br />");
document.write(Number(test5)+ "<br />");
</script>
|
The output of the code above will be:
Try-It-Yourself Demos
Number()
How to use Number().
Complete Function Reference
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