This programming language misconception is about the implementation of recursive functions.

Incorrect and Correct Conception

Convince Yourself

You see that the output is the same in both cases. Thus even a one-branch if-statement can be enough; especially if, like here, there is nothing to do in the base case.

Learn More

If you would like to learn more about this misconception, including its possible origins, symptoms students who hold this misconception might exhibit, the related programming language concepts, links to the corresponding parts of the Python language specification, and related misconceptions, check out RecursiveFunctionNeedsIfElse in the progmiscon.org misconception inventory.