Thanks for this suggestion - it works great. import sys # run: python3 countdown.py 10 def main(n:int): print(n) or n-1 and main(n-1) main(int(sys.

Thanks for this suggestion - it works great. import sys # run: python3 countdown.py 10 def main(n:int): print(n) or n-1 and main(n-1) main(int(sys.argv[1])) This also works and is definitely more Pythonic: _ = [print(n) for n in range(10,0,-1)]