---
title: "Explain the difference between null and undefined in JavaScript."  
description: "Explain the difference between null and undefined in JavaScript."  
author: "Revati S Misra"  
published: 2023-04-14  
updated: 2023-04-17  
canonical: https://www.mindstick.com/forum/157810/explain-the-difference-between-null-and-undefined-in-javascript  
category: "javascript"  
tags: ["javascript", "javascript object"]  
reading_time: 1 minute  

---

# Explain the difference between null and undefined in JavaScript.

[Explain](https://www.mindstick.com/forum/157854/what-is-system-debugging-explain-some-system-debugging-tools-used-in-modern-computer-systems) the [difference between null](https://www.mindstick.com/interview/33912/what-is-the-difference-between-null-and-undefined-in-javascript) and undefined in JavaScript.

## Replies

### Reply by Aryan Kumar

In JavaScript, **[null](https://www.mindstick.com/forum/33922/how-to-use-null-coalescing-operator-in-c-sharp)** and **undefined** are both values that represent the absence of something, but they have different meanings.

**undefined** is a value that is assigned to a variable that has been declared but has not been assigned a value. It is also returned when accessing an object property that does not exist or when a function does not return a value.\
\
**null**, on the other hand, is a value that is explicitly assigned to a variable to represent the absence of an object. It is often used to indicate that a variable should have no value


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Original Source: https://www.mindstick.com/forum/157810/explain-the-difference-between-null-and-undefined-in-javascript

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