How to implement a recursive factorial function without using the multiplication operator?

Question

this is my example of recursive using '*' operation!

def rec_fac(n):
   if n == 1:
       return n
   else:
       return n*rec_fac(n-1)

Answer 1

If you'd like a technicality, try this:

def rec_fac(n):
    if n == 1:
        return n
    else:
        return eval('n*rec_fac(n-1)')

Otherwise, you should try addition:

def rec_fac(n):
    if n == 1:
        return 1
    else:
        return sum([n for i in range(rec_fac(n-1))])