User Guide

isFinite() 339
isFinite()
Availability
Flash Player 5.
Usage
isFinite(expression:Object) : Boolean
Parameters
expression
A Boolean value, variable, or other expression to be evaluated.
Returns
A Boolean value.
Description
Function; evaluates expression and returns true if it is a finite number or false if it is infinity
or negative infinity. The presence of infinity or negative infinity indicates a mathematical error
condition such as division by 0.
Example
The following example shows return values for isFinite:
isFinite(56)
// returns true
isFinite(Number.POSITIVE_INFINITY)
// returns false
CHAPTER 2
ActionScript Language Reference