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.

3 days ago · JavaScript provides three ways to declare variables: var, let, and const, but they differ in scope, hoisting behaviour, and re-assignment rules. var: Declares variables with function or global …

Apr 24, 2025 · Use const by default, let when necessary, and avoid var unless there's a specific reason. By following modern best practices and staying consistent with variable declarations, you'll not only …

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, …

Jan 8, 2026 · If you’re learning JavaScript, one of the most common (and confusing) questions is: 👉 Should I use var, let, or const? All three are used to declare variables, but they behave very ...

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 …

Sep 7, 2025 · Variables are the building blocks of any programming language, and JavaScript offers three distinct ways to declare them: var, let, and const.

Apr 26, 2025 · Understanding the difference between var, let, and const is crucial for any JavaScript developer, especially for beginners. These keywords are used for variable declaration, but they differ …

Jan 11, 2026 · The answer isn't just "var is old, use let/const instead." There's a fundamental difference in how these keywords interact with JavaScript's execution model - specifically, how the engine …

Const and let are both used to declare variables in JavaScript, but they have some key differences. Const is used to declare variables that cannot be reassigned, meaning their value remains constant …