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 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 …

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 …

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

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.

Apr 16, 2025 · Learn how to declare constants in JavaScript using the const keyword, with examples and explanations.

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 …

Sep 14, 2025 · Introduced in ES6 (ES2015), const is a keyword used to declare a block-scoped variable that cannot be reassigned. Let's break that definition down because every part of it is crucial.

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

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 …