Why does my recursive function with if-elif statements return None?

Question

I\'m currently trying to wrap my head around learning Python and I\'ve come to a bit of a stall on recursive functions. In Think Python, one of the exercises is to write a f

Answer 1

def isPower (a,b):
    return a==1 or (a!=0 and b!=0 and b!=1 and isPower((a/b),b))