G-L > isFinite

isFinite

isfinite

Availability

Flash Player 5.

Usage

isFinite(expression)

Parameters

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

Returns

A Boolean value.

Description

Top-level function; evaluates the expression 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.

Example

The following are examples of return values for isFinite:

isFinite(56)
// returns true

isFinite(Number.POSITIVE_INFINITY)
// returns false