Jul 8, 2025 · The const declaration declares block-scoped local variables. The value of a constant can't be changed through reassignment using the assignment operator, but if a constant is an object, its …

Declaring a variable with const is similar to let when it comes to Block Scope. The x declared in the block, in this example, is not the same as the x declared outside the block:

Jul 11, 2025 · The const keyword in JavaScript is a modern way to declare variables, introduced in (ES6). It is used to declare variables whose values need to remain constant throughout the lifetime of …

Read this tutorial and learn useful information about declaring a constant by using the const keyword which creates a read-only reference to the value.

Oct 27, 2023 · The const keyword is used to declare a variable that can’t be changed after its declaration. This keyword is short for constant (which means “doesn’t change”), and it’s used in a …

This tutorial shows you how to use the JavaScript const keyword to declare constants whose values are immutable.

Jan 20, 2014 · There are two aspects to your questions: what are the technical aspects of using const instead of var and what are the human-related aspects of doing so. The technical difference is …

JavaScript constants are the variables whose values remain unchanged throughout the execution of the program. You can declare constants using the const keyword.

Jun 5, 2024 · const keyword in JavaScript is primarily used for declaring constants. The value of a const variable cannot be reassigned after initialization. Example: This example shows the declaration of an …

Sep 14, 2025 · What does "constant" really mean in JavaScript? And why can you change a const array's elements, but not reassign the array itself? This guide is here to demystify it all. We're going …