JavaScript Number isFinite() method

The JavaScript number isFinite() method determines whether the given value is a finite number. It returns true if the value is a finite number, otherwise it returns false.

Syntax

The isFinite() method is represented by the following syntax:

Parameter

num – A number to be checked.

Return

A Boolean value.

JavaScript Number isFinite() method example

Here, we will understand isFinite() method through various examples.

Example 1

Let’s see a simple example of isFinite() method.

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Output:

true true true   

Example 2

In this example, we will use isFinite() method with negative numbers.

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Output:

true false   

Example 3

Let’s see isFinite() method with some different test cases.

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Output:

false false false