These two keywords provide Block Scope in JavaScript. Variables declared with let and const inside a code block are "block-scoped," meaning they are only accessible within that block.

Jan 16, 2026 · In JavaScript, scope is the context that determines where variables can be accessed, helping write cleaner and error-free code.

In JavaScript, the scope of a variable determines where it can be accessed within the code. In this tutorial, you will learn about variable scope in JavaScript with the help of examples.

Nov 13, 2023 · JavaScript offers various types of scope, with the three primary ones being global, local, and block scope. These scopes control the accessibility of variables in different parts of your code …

Feb 1, 2009 · Outside of the special cases of global and module scope, variables are declared using var (function scope), let (block scope), and const (block scope). Most other forms of identifier declaration …

Sep 18, 2025 · A: When JavaScript looks for a variable, it first looks in the current scope. If it doesn't find it, it looks in the outer (enclosing) scope, and continues this process until it reaches the global scope.

This guide will help you learn about variable scope in JavaScript, which is very important if you want to be good at coding. We will talk about what variable scope means and why it matters. By reading this, …

Learn about variable scope in JavaScript, including local and global scopes, and how they affect variable accessibility in your code.

In this tutorial, you will learn about the JavaScript variable scope that determines the visibility and accessibility of variables.

1 day ago · Learn JavaScript variables, data types, var vs let vs const, scope, and hoisting explained clearly with simple beginner-friendly examples.