ContextQMD
Back to Freecodecamp

Sum multiples of 3 and 5

curriculum/challenges/english/blocks/rosetta-code-challenges/5a23c84252665b21eecc8040.md

latest998 B
Original Source

--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.

js
assert(typeof sumMults == 'function');

sumMults(10) should return a number.

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

sumMults(10) should return 23.

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

sumMults(100) should return 2318.

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

sumMults(1000) should return 233168.

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

sumMults(10000) should return 23331668.

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

sumMults(100000) should return 2333316668.

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

--seed--

--seed-contents--

js
function sumMults(n) {

}

--solutions--

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