---
title: "what does is NAN function do?"  
description: "what does is NAN function do?"  
author: "Amit Singh"  
published: 2010-10-15  
updated: 2020-09-22  
canonical: https://www.mindstick.com/interview/3/what-does-is-nan-function-do  
category: "javascript"  
tags: ["javascript"]  
reading_time: 1 minute  

---

# what does is NAN function do?

NAN function check the value, which is number or not for example console.writeline(isNAN(5)); it gives the boolean value like true or false

## Answers

### Answer by Amit Singh

NAN function check the value, which is number or not for example console.writeline(isNAN(5)); it gives the boolean value like true or false


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Original Source: https://www.mindstick.com/interview/3/what-does-is-nan-function-do

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