Project Euler 1 Multiples of 3 and 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.
'''
from math import *
m=1000
s=i=0
while i<1000:
if i%3==0:
s+=i
elif i%5==0:
s+=i
i+=1
print s