How to find the sum of all the multiples of 3 or 5 below 1000 in Python?

Question

Not sure if I should\'ve posted this on math.stackexchange instead, but it includes more programming so I posted it here.

The question seems really simple, but I\'ve

Answer 1

You can also use functional programming tools (filter):

def f(x):
    return x % 3 == 0 or x % 5 == 0
    filter(f, range(1,1000)) 
print(x)

Or use two lists with subtraction of multiples of 15 (which appears in both lists):

sum1 = []
for i in range(0,1000,3):
    sum1.append(i)
sum2 = []
for n in range(0,1000,5):
    sum2.append(n)
del sum2[::3] #delete every 3-rd element in list
print(sum((sum1)+(sum2)))

I like this solution but I guess it needs some improvements...