multiples3or5.py

"""
https://projecteuler.net/problem=1
Multiples of 3 or 5
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.
Find the sum of all the multiples of 3 or 5 below 1000.
"""
def thirds(i):
    return True if i%3 == 0 else False

def fifths(i):
    return True if i%5 == 0 else False

def main(x):
    return sum([i for i in range(1, x) if thirds(i) or fifths(i)])


print(main(1000))