De-I > isFinite

isFinite

Syntax

isFinite(expression);

Arguments

expression The Boolean, variable, or other expression to be evaluated.

Description

Top-level function; evaluates the argument and returns true if it is a finite number, and 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.

Player

Flash 5 or later.

Example

The following are examples of return values for isFinite:

isFinite(56) returns true

isFinite(Number.POSITIVE_INFINITY) returns false

isNaN(Number.POSITIVE_INFINITY) returns false