'''
Created on Jan 21, 2016

@author: Susan
'''
def sum(a, b):
    return a + b

sum(3,6)  # doesn't print anything but does call sum
print sum(3,6)
print sum(4,2)
print sum(5,3)
print "the sum of 5 + 4  is ", sum(5,4)
print sum("cat","dog")

#print sum("cat",3)
print sum("cat")