JavaScript isFinite() Function
 Complete Function Reference
Definition and Usage
The isFinite() function is used to check if a value is a finite number.
Syntax
| Parameter |
Description |
| number |
Required. The value to be tested |
Example
In this example we use isFinite() to check for finite numbers:
<script type="text/javascript">
document.write(isFinite(123)+ "<br />");
document.write(isFinite(-1.23)+ "<br />");
document.write(isFinite(5-2)+ "<br />");
document.write(isFinite(0)+ "<br />");
document.write(isFinite("Hello")+ "<br />");
document.write(isFinite("2005/12/12")+ "<br />");
</script>
|
The output of the code above will be:
true
true
true
true
false
false
|
Try it yourself »
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