/*
https://projecteuler.net/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.
*/

var isMultipleOf = (m) => (n) => n % m === 0;
var is3_ = isMultipleOf(3);
var is5_ = isMultipleOf(5);

var is3 = (n) => n % 3 === 0;
var is5 = (n) => n % 5 === 0;

var limit = 1000;
let result = 0;
for (let i = 0; i < limit; i++) {
  if (is3(i) || is5(i)) {
    result += i;
  }
}

console.log(`Answer is ${result}`);