How to Check If A Value Is Not A Number in Javascript

In this article, you will learn how to Check If A Value Is Not A Number in Javascript. Let's say you have 5 types of variables.

In this article, you will learn how to Check If A Value Is Not A Number in Javascript.

Let’s say you have 5 types of variables.

// 1: A number variable named 'a' with the value 123
var a = 123;

// 2: A string variable named 'b' with the value "codesource"
var b = "codesource";

// 3: A boolean variable named 'c' with the value true
var c = true;

// 4: An undefined variable named 'd' with the value undefined
var d;

// 5: A null variable named 'e' with the value null
var e = null;

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