An endless generator in Python
Python interview exercise on Iterators & Generators, difficulty 2 of 3. Solve it in the editor beside a worked example; the tests run the moment you do.
Write fibonacci(), a generator that yields 0, 1, 1, 2, 3, 5, ... forever. It never finishes, and that is fine: the caller decides how much to take.
Each exercise pairs a worked example with a twin problem to solve in a real editor; the tests run the moment you do. Progress is saved in your browser, and in your account if you sign in.