isFinite() global function JS Home  <<  JS Reference  <<  isFinite()

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Global function finite test.

Description

Evaluates the passed argument to see if it is finite.

Syntax

Parameters

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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• isNaN()     >>