Web Reference: Creating a variable in JavaScript is called declaring a variable. You declare a JavaScript variable with the let keyword or the const keyword. After the declaration, the variable has no value (technically it is undefined). To assign a value to the variable, use the equal sign: Most often you will assign a value to the variable when you declare it: Nov 7, 2023 · Let's dive into these different ways of declaring variables in JavaScript so you know how they work and when to use each one. How to Declare Variables in JavaScript Aug 18, 2025 · To use a variable, you've first got to create it — more accurately, we call this declaring the variable. To do this, we type the keyword let followed by the name you want to call your variable:
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