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. Whether you are tracking a user's score, holding an API response, or counting loop iterations, you are using variables. JavaScript offers three ways to declare variables: let, const, and var. Each behaves differently in subtle but important ways, and choosing the right one matters. Aug 5, 2025 · You can declare variables using the var, let, or const keywords. JavaScript provides different ways to declare multiple variables either individually or in a single line for efficiency and readability.
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