1_Multiples_of_3 _and_5.js

/* 
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 the provided parameter value number. */

function multiplesOf3and5(number) {
    let sum = 0
    for (let i = 0; i < number; i++) {
        if (i % 3 === 0 || i % 5 === 0) { sum += i }
    }
    return sum
}

multiplesOf3and5(1000);