You need to calculate the sum of all the multiples of 3 or 5 below a given number.
Given an integer number, output the sum of all the multiples of 3 and 5 below that number. If a number is a multiple of both, 3 and 5, it should appear in the sum only once.
An integer.
An integer, representing the sum of all the multiples of 3 and 5 below the given input.
10
23
The numbers below 10 that are multiples of 3 or 5 are 3, 5, 6 and 9. The sum of these numbers is 3+5+6+9=23