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Why does console.log show 'undefined' when I inspect a variable in the DevTools console?

Asked on Dec 15, 2025

Answer

When you see "undefined" in the console after inspecting a variable, it typically means that the variable has been declared but not assigned a value. Here's a simple example to illustrate this:

<!-- BEGIN COPY / PASTE -->
        let myVariable;
        console.log(myVariable); // Outputs: undefined
        <!-- END COPY / PASTE -->

Additional Comment:

The variable "myVariable" is declared but not initialized, so its value is "undefined".
"undefined" is a primitive value in JavaScript that indicates the absence of a value.
If you assign a value to "myVariable" (e.g., "myVariable = 10;"), "console.log(myVariable);" would output "10" instead.

✅ Answered with JavaScript best practices.

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

Why does console.log show 'undefined' when I inspect a variable in the DevTools console?

Asked on Dec 15, 2025

Answer

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