1. Write a function named different that has two parameters, a and b. The function 
should return True if a and b refer to different values and should return 
False otherwise.

2. We've now seen two loop types, the first loop and the while loop.  Even though their
both useful, the for loop doesn't actually add any additional functionality; it's just
convenient.  Rewrite the following function that sums up the numbers from 1 to n
using a while loop.

def my_sum(n):
    total = 0

    for i in range(1,n+1):
        total += i

    return total