Lambros Hatzinikolaou • 9/24/2025

Var, let and const variables. How they differ and which one to use

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This article provides a detailed comparison of JavaScript's variable declaration keywords: var, let, and const. It explains the historical context of their introduction with ES6, delves into the concept of hoisting, and highlights the scoping issues associated with `var`. The guide aims to help developers understand the distinct behaviors and choose the appropriate keyword for writing cleaner, more predictable code.

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#JavaScript #es6 #scope
Var, let and const variables. How they differ and which one to use

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