Web Reference: 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 Both var and let allow for a variable to be reassigned, however we can only declare a variable with let once. When we work with const, the variable is read only and can't be changed. 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.
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