isFinite() global functionS2C Home « Globals « isFinite()
Global function finite test.
Description
Evaluates the passed argument to see if it is finite.
Syntax
| Signature | Description |
|---|---|
isFinite(number) | Evaluates the passed argument to see if it is finite. |
Parameters
| Parameter | Description |
|---|---|
number | The numerical value you want to evalute:
|
Examples
Below are some examples of using the isFinite() function.
/*
* The isFinite method returns true for all values except
* +/- infinity and NaN.
*/
var isFiniteValues = new Array(5);
isFiniteValues[0] = isFinite(Number.NEGATIVE_INFINITY);
isFiniteValues[1] = isFinite(Number.POSITIVE_INFINITY);
isFiniteValues[2] = isFinite(NaN);
isFiniteValues[3] = isFinite(-123456789);
isFiniteValues[4] = isFinite(123.456);
alert(isFiniteValues);
Related Tutorials
JavaScript Advanced Tutorials - Lesson 3 - Number
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