def sum_sub(a, b):
    c = a+b
    d = a-b
    return c, d


x, y = sum_sub(10, 5)
print('addition is = ', x)
print('sub is = ', y)



#print('addition of {} and {}'.format(x,y)
#print("sub of {} and {} is = ",y)

#print('Factorial of {} is {}'.format(i, fact(i)))