UncleCoder.com

UncleCoder.com

Free programming examples and instructions

Check variable is NaN - Javascript

Demo and code for how to check variable is NaN in Javascript

by Athil


Posted on 27 Jun 2018 Category: Javascript Views: 78

Edited on 03 Jul 2019


Here I am going to show how to check value or a variable is NaN in Javascript.

Syntax

isNaN(value)

This will return True/False.

Example 

var b;
b = isNaN(a);

Where variable b having the value true Or false. If the variable a is NaN then it will return true or it will return false.



Leave a Comment:


Advertisement