Project Euler: Problem 1

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.



In [20]:

    
# YOUR CODE HERE
summ = 0                          #rolling count
x = 1                             #loop variable
while x < 1000:                   #while loop that iterates 999 times
    if x%3 == 0 or x%5 == 0:      # checks if x is a multiple of 3 or 5
        summ += x
    x +=1                         #increments loop variable to test next number

print (summ)



In [14]:

    
# This cell will be used for grading, leave it at the end of the notebook.