Python - Multiplos del 3 y 5 hasta el 1000

>>> def SumaConWhile():

	i = 0

	suma = 0

	while (i <= 1000):

		if (((i % 3) == 0) or ((i % 5) == 0)):

			suma += i

		i += 1

	return(suma)

>>> SumaConWhile()

234168

>>> def SumaConFor():

	suma = 0

	for i in range(0,1001):

		if (((i % 3) == 0) or ((i % 5) == 0)):

			suma += i

	return(suma)

>>> SumaConFor()

234168

>>>