2018-12-30 19:05:56 +05:30
|
|
|
---
|
|
|
|
id: 5a23c84252665b21eecc8040
|
|
|
|
title: Sum multiples of 3 and 5
|
|
|
|
challengeType: 5
|
2019-08-05 09:17:33 -07:00
|
|
|
forumTopicId: 302332
|
2021-01-13 03:31:00 +01:00
|
|
|
dashedName: sum-multiples-of-3-and-5
|
2018-12-30 19:05:56 +05:30
|
|
|
---
|
|
|
|
|
2020-11-27 19:02:05 +01:00
|
|
|
# --description--
|
2020-03-30 11:23:18 -05:00
|
|
|
|
2020-11-27 19:02:05 +01:00
|
|
|
The objective is to write a function that finds the sum of all positive multiples of 3 or 5 below *n*.
|
2019-07-18 17:32:12 +02:00
|
|
|
|
2020-11-27 19:02:05 +01:00
|
|
|
# --hints--
|
2020-03-30 11:23:18 -05:00
|
|
|
|
2020-11-27 19:02:05 +01:00
|
|
|
`sumMults` should be a function.
|
2018-12-30 19:05:56 +05:30
|
|
|
|
2020-11-27 19:02:05 +01:00
|
|
|
```js
|
|
|
|
assert(typeof sumMults == 'function');
|
|
|
|
```
|
2020-03-30 11:23:18 -05:00
|
|
|
|
2020-11-27 19:02:05 +01:00
|
|
|
`sumMults(10)` should return a number.
|
2018-12-30 19:05:56 +05:30
|
|
|
|
2020-11-27 19:02:05 +01:00
|
|
|
```js
|
|
|
|
assert(typeof sumMults(10) == 'number');
|
|
|
|
```
|
2018-12-30 19:05:56 +05:30
|
|
|
|
2020-11-27 19:02:05 +01:00
|
|
|
`sumMults(10)` should return `23`.
|
2020-03-30 11:23:18 -05:00
|
|
|
|
2020-11-27 19:02:05 +01:00
|
|
|
```js
|
|
|
|
assert.equal(sumMults(10), 23);
|
|
|
|
```
|
2018-12-30 19:05:56 +05:30
|
|
|
|
2020-11-27 19:02:05 +01:00
|
|
|
`sumMults(100)` should return `2318`.
|
|
|
|
|
|
|
|
```js
|
|
|
|
assert.equal(sumMults(100), 2318);
|
2018-12-30 19:05:56 +05:30
|
|
|
```
|
|
|
|
|
2020-11-27 19:02:05 +01:00
|
|
|
`sumMults(1000)` should return `233168`.
|
2018-12-30 19:05:56 +05:30
|
|
|
|
2020-11-27 19:02:05 +01:00
|
|
|
```js
|
|
|
|
assert.equal(sumMults(1000), 233168);
|
|
|
|
```
|
2020-03-30 11:23:18 -05:00
|
|
|
|
2020-11-27 19:02:05 +01:00
|
|
|
`sumMults(10000)` should return `23331668`.
|
2019-07-18 17:32:12 +02:00
|
|
|
|
2020-11-27 19:02:05 +01:00
|
|
|
```js
|
|
|
|
assert.equal(sumMults(10000), 23331668);
|
|
|
|
```
|
|
|
|
|
|
|
|
`sumMults(100000)` should return `2333316668`.
|
|
|
|
|
|
|
|
```js
|
|
|
|
assert.equal(sumMults(100000), 2333316668);
|
|
|
|
```
|
|
|
|
|
|
|
|
# --seed--
|
|
|
|
|
|
|
|
## --seed-contents--
|
2018-12-30 19:05:56 +05:30
|
|
|
|
|
|
|
```js
|
2019-03-10 19:14:48 +09:00
|
|
|
function sumMults(n) {
|
2020-09-15 09:57:40 -07:00
|
|
|
|
2018-12-30 19:05:56 +05:30
|
|
|
}
|
|
|
|
```
|
|
|
|
|
2020-11-27 19:02:05 +01:00
|
|
|
# --solutions--
|
2018-12-30 19:05:56 +05:30
|
|
|
|
|
|
|
```js
|
2019-03-10 19:14:48 +09:00
|
|
|
function sumMults(n) {
|
2018-12-30 19:05:56 +05:30
|
|
|
var sum = 0;
|
|
|
|
for (var i = 1; i < n; i++) {
|
|
|
|
if (i % 3 == 0 || i % 5 == 0) sum += i;
|
|
|
|
}
|
|
|
|
return sum;
|
|
|
|
}
|
|
|
|
```
|