Understanding Variable Declaration in JavaScript: A Guide

Did you know that JavaScript provides three main ways to declare variables? var, let, and const each have its own use case. In this guide, we'll dive into the characteristics of each and help you decide which one to use.

**Var**: Originally used for declaring variables, but less common today due to quirks. It's function-scoped or globally scoped, leading to unexpected behavior.

**Let**: Used when values might change later on. Limited to the block where it's defined, preventing hoisting confusion.

**Const**: Declares a constant variable that cannot be reassigned. Useful for configuration settings or unchangeable values.

When choosing between var, let, and const, consider:

* Use let for reassigning variables with limited scope.

* Use const for variables that shouldn't change after assignment.

* Avoid using var in modern JavaScript unless working with legacy code.

By understanding the differences between these three variable declaration methods, you'll write more efficient and bug-free code.

Source: https://dev.to/diwakar_verma_381fc6e5e2f/how-to-declare-variables-in-javascript-2jnj