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How do I declare a variable in JavaScript?

Asked on Jun 22, 2025

Answer

In JavaScript, you can declare a variable using "let", "const", or "var". "let" and "const" are preferred in modern ES6+ code due to their block scope and other benefits.

<!-- BEGIN COPY / PASTE -->
        let name = "Alice";
        const age = 30;
        var city = "New York";
        <!-- END COPY / PASTE -->

Additional Comment:

"let" is used for variables that can be reassigned.
"const" is used for variables that should not be reassigned.
"var" is the old way of declaring variables and is function-scoped, which can lead to unexpected behavior. It's generally recommended to use "let" or "const" instead.
Always choose "const" by default unless you know the variable will need to change.

✅ Answered with JavaScript best practices.

Ask any question about JavaScript here... and get an instant response.

How do I declare a variable in JavaScript?

Asked on Jun 22, 2025

Answer

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