---
title: "Discussion on \"Important concepts in Javascript\" | Hashnode"
description: "Discussion on \"Important concepts in Javascript\". Scope\nScope is a certain region of a program where a defined variable exists & can be accessed.\nDifferent types of scope are -> function scope and block scope. \nvar is function scope. \nfunction fname()\n{\n// function scope\n}\nlet & const are block scop..."
url: "https://hashnode.com/posts/important-concepts-in-javascript/630fa62956df9e8e50259f9e"
---

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# [Important concepts in Javascript](https://prathameshsawant.hashnode.dev/important-concepts-in-javascript?utm_source=hashnode&utm_medium=feed)

Scope Scope is a certain region of a program where a defined variable exists & can be accessed. Different types of scope are -> function scope and block scope. var is function scope. function fname() { // function scope } let & const are block scop...

Aug 31, 2022 · 2 min read · prathameshsawant.hashnode.dev  
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