Web Reference: Declaring JavaScript Variables Creating a variable in JavaScript is called declaring a variable. You declare a JavaScript variable with the let keyword or the const keyword. Nov 30, 2020 · In JavaScript, you can declare variables by using the keywords var, const, or let. In this article, you’ll learn why we use variables, how to use them, and the differences between const, let and var. May 5, 2025 · JavaScript provides three ways to declaring variables: var, let and const. While they all serve the purpose of creating variables, they have important differences in how they behave, particularly considering their scope and whether their values can be reassigned.
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