---
title: "Discussion on \"NaN and undefined in Javascript\" | Hashnode"
description: "Discussion on \"NaN and undefined in Javascript\". Great question! NaN (Not-a-Number) and undefined are different in JavaScript, and understanding their differences is crucial. Here's a breakdown:\n\n🔹 Difference Between NaN and undefined\n\n\n\n\nFeatureNaN (Not-a-Number)undefined\n\n\n\nMeaningRepresents an ..."
url: "https://hashnode.com/posts/nan-and-undefined-in-javascript/67d163f5af653cddad9c7cf4"
---

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# [NaN and undefined in Javascript](https://javascriptlearninginfo.hashnode.dev/nan-and-undefined-in-javascript?utm_source=hashnode&utm_medium=feed)

Great question! NaN (Not-a-Number) and undefined are different in JavaScript, and understanding their differences is crucial. Here's a breakdown: 🔹 Difference Between NaN and undefined FeatureNaN (Not-a-Number)undefined MeaningRepresents an ...

Mar 12, 2025 · 2 min read · javascriptlearninginfo.hashnode.dev  
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## Written by

[Dikshant Koriwar](https://hashnode.com/@dikshant25)

@dikshant25 · Nagpur

  
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Code. Create. Conquer.

Hi, I'm Dikshant – a passionate developer with a knack for transforming ideas into robust, scalable applications. I thrive on crafting clean, efficient code and solving challenging problems with innovative solutions. Whether I'm diving into the latest frameworks, optimizing performance, or contributing to open source, I'm constantly pushing the boundaries of what's possible with technology. On Hashnode, I share my journey, insights, and the occasional coding hack—all fueled by curiosity and a love for continuous learning. When I'm not immersed in code, you'll likely find me exploring new tech trends, tinkering with side projects, or simply enjoying a great cup of coffee. Let's connect, collaborate, and build something amazing—one line of code at a time!

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