Write step_down(n, step) that returns [n, n-step, n-2·step, …] keeping only numbers above 0.
step_down(10, 3) → [10, 7, 4, 1]
step_down(0, 2) → []
Submit runs 4 tests, including hidden edge cases.
Each hint gives a little more help. Try on your own first.
Run your code to see the output here.