""" 
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 natural_numbers():
    return sum(i for i in range(1000) if i % 5 ==0 or i % 3 ==0)

if __name__ == '__main__':
    print(natural_numbers())

""" 
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 natural_numbers():
    return sum(i for i in range(1000) if i % 5 ==0 or i % 3 ==0)

if __name__ == '__main__':
    print(natural_numbers())

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.