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. In this tutorial, you'll learn about JavaScript variables and how to use variables to store values in the application. Feb 25, 2026 · Variables are used to store this information. A variable is a “named storage” for data. We can use variables to store goodies, visitors, and other data. To create a variable in JavaScript, use the let keyword. The statement below creates (in other words: declares) a variable with the name “message”:
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