Check variable is NaN - Javascript

by Athil

Posted on 27 Jun 2018 Category: Javascript Views: 1182

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.