SOMA Recursiva

# -*- coding: utf-8 -*-
"""
Created on Tue Aug 18 20:03:40 2015

@author: gregory.mendes
"""

def soma(x,y):
   if y > x:
        return soma(y,x)
   if y == 0:
       return x
   elif x == 0:
       return y
   else:
      return soma(x+1,y-1)