Multiples_of_3_or_5.py

"""

If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9.
The sum of these multiples is 23.
Finish the solution so that it returns the sum of all the multiples of 3 or 5 below the number
passed in.

Note: If the number is a multiple of both 3 and 5, only count it once.

"""



def solution(number):
    sum = 0
    for num in range(number):
        if num % 3 == 0 or num % 5 == 0:
            sum += num
    return sum