---
title: "Discussion on \"Mastering JavaScript: Differences Between var, let, and const\" | Hashnode"
description: "Discussion on \"Mastering JavaScript: Differences Between var, let, and const\". In JavaScript, var, let, and const are used to declare variables, but they have some key differences:\nvar\n\nScope: var is function-scoped, meaning it is accessible within the function it is declared in. If declared outside a function, it is globally s..."
url: "https://hashnode.com/posts/mastering-javascript-differences-between-var-let-and-const/66e704cd9188f363d0ebd989"
---

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# [Mastering JavaScript: Differences Between var, let, and const](https://dhananjoymahata.hashnode.dev/mastering-javascript-differences-between-var-let-and-const?utm_source=hashnode&utm_medium=feed)

In JavaScript, var, let, and const are used to declare variables, but they have some key differences: var Scope: var is function-scoped, meaning it is accessible within the function it is declared in. If declared outside a function, it is globally s...

Sep 15, 2024 · 2 min read · dhananjoymahata.hashnode.dev  
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[Dhananjoy Mahata](https://hashnode.com/@Dhananjoy99)

@Dhananjoy99 · Kolkata, India

  
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