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. Aug 18, 2025 · Variables aren't the values themselves; they are containers for values. You can think of them being like little cardboard boxes that you can store things in. To use a variable, you've first got to create it — more accurately, we call this declaring the variable. 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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