Apr 18, 2009 · Variables declared with let or const remain uninitialized at the beginning of execution while that variables declared with var are being initialized with a value of undefined.

Jul 11, 2025 · With the introduction of ES6 in 2015 two more keywords, let and const came into the picture. var and let are both used for variable declaration in javascript but the difference between …

Apr 2, 2020 · In this article, we'll discuss var, let and const with respect to their scope, use, and hoisting. As you read, take note of the differences between them that I'll point out. Before the advent of ES6, …

Apr 24, 2025 · Understanding the differences between var, let, and const is essential for writing efficient and error-free JavaScript code. While var served well in the early days, the arrival of let and const …

Jul 30, 2025 · JavaScript: var vs let vs const Key Differences and Best Practices In JavaScript, variables can be declared using var, let, or const. Each of these has different characteristics in...

Aug 20, 2025 · Understanding the difference between var, let, and const in JavaScript is crucial for writing clean, efficient, and bug-free code. In this article, we break down their scope, hoisting, …

May 21, 2025 · JavaScript offers three main keywords for declaring variables: var, let, and const. While they may seem similar at first, they behave very differently — especially when it comes to scope, …

Nov 24, 2025 · “What is the difference between var, let, and const?” var is function-scoped and hoists as undefined. let and const are block-scoped and hoisted into the temporal dead zone. let allows …

In this tutorial, you will learn about the difference between let and var in JavaScript with the help of examples.

These are important to understand to truly be able to tell the difference between let and var in JavaScript. In this guide, you learn what is the difference between var and let in JavaScript.