freeCodeCamp/curriculum/challenges/portuguese/10-coding-interview-prep/rosetta-code/sum-multiples-of-3-and-5.md

id	title	challengeType	forumTopicId	dashedName
5a23c84252665b21eecc8040	Sum multiples of 3 and 5	5	302332	sum-multiples-of-3-and-5

--description--

The objective is to write a function that finds the sum of all positive multiples of 3 or 5 below n.

--hints--

sumMults should be a function.

assert(typeof sumMults == 'function');

sumMults(10) should return a number.

assert(typeof sumMults(10) == 'number');

sumMults(10) should return 23.

assert.equal(sumMults(10), 23);

sumMults(100) should return 2318.

assert.equal(sumMults(100), 2318);

sumMults(1000) should return 233168.

assert.equal(sumMults(1000), 233168);

sumMults(10000) should return 23331668.

assert.equal(sumMults(10000), 23331668);

sumMults(100000) should return 2333316668.

assert.equal(sumMults(100000), 2333316668);

--seed--

--seed-contents--

function sumMults(n) {

}

--solutions--

function sumMults(n) {
  var sum = 0;
  for (var i = 1; i < n; i++) {
    if (i % 3 == 0 || i % 5 == 0) sum += i;
  }
  return sum;
}