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Contents

# Sum Of Multiples

Given a number, find the sum of all the unique multiples of particular numbers up to
but not including that number.

If we list all the natural numbers below 20 that are multiples of 3 or 5,
we get 3, 5, 6, 9, 10, 12, 15, and 18.

The sum of these multiples is 78.

## Running tests

In order to run the tests, issue the following command from the exercise
directory:

For running the tests provided, `rebar3` is used as it is the official build and
dependency management tool for erlang now. Please refer to [the tracks installation
instructions](http://exercism.io/languages/erlang/installation) on how to do that.

In order to run the tests, you can issue the following command from the exercise
directory.

```bash
$ rebar3 eunit
```

### Test versioning

Each problem defines a macro `TEST_VERSION` in the test file and
verifies that the solution defines and exports a function `test_version`
returning that same value.

To make tests pass, add the following to your solution:

```erlang
-export([test_version/0]).

test_version() ->
  1.
```

The benefit of this is that reviewers can see against which test version
an iteration was written if, for example, a previously posted solution
does not solve the current problem or passes current tests.

## Questions?

For detailed information about the Erlang track, please refer to the
[help page](http://exercism.io/languages/erlang) on the Exercism site.
This covers the basic information on setting up the development
environment expected by the exercises.

## Source

A variation on Problem 1 at Project Euler [http://projecteuler.net/problem=1](http://projecteuler.net/problem=1)

## Submitting Incomplete Solutions
It's possible to submit an incomplete solution so you can see how others have completed the exercise.

Version data entries

68 entries across 68 versions & 1 rubygems

Version Path
trackler-2.2.1.180 tracks/erlang/exercises/sum-of-multiples/README.md
trackler-2.2.1.179 tracks/erlang/exercises/sum-of-multiples/README.md
trackler-2.2.1.178 tracks/erlang/exercises/sum-of-multiples/README.md
trackler-2.2.1.177 tracks/erlang/exercises/sum-of-multiples/README.md
trackler-2.2.1.176 tracks/erlang/exercises/sum-of-multiples/README.md
trackler-2.2.1.175 tracks/erlang/exercises/sum-of-multiples/README.md
trackler-2.2.1.174 tracks/erlang/exercises/sum-of-multiples/README.md
trackler-2.2.1.173 tracks/erlang/exercises/sum-of-multiples/README.md
trackler-2.2.1.172 tracks/erlang/exercises/sum-of-multiples/README.md
trackler-2.2.1.171 tracks/erlang/exercises/sum-of-multiples/README.md
trackler-2.2.1.170 tracks/erlang/exercises/sum-of-multiples/README.md
trackler-2.2.1.169 tracks/erlang/exercises/sum-of-multiples/README.md
trackler-2.2.1.167 tracks/erlang/exercises/sum-of-multiples/README.md
trackler-2.2.1.166 tracks/erlang/exercises/sum-of-multiples/README.md
trackler-2.2.1.165 tracks/erlang/exercises/sum-of-multiples/README.md
trackler-2.2.1.164 tracks/erlang/exercises/sum-of-multiples/README.md
trackler-2.2.1.163 tracks/erlang/exercises/sum-of-multiples/README.md
trackler-2.2.1.162 tracks/erlang/exercises/sum-of-multiples/README.md
trackler-2.2.1.161 tracks/erlang/exercises/sum-of-multiples/README.md
trackler-2.2.1.160 tracks/erlang/exercises/sum-of-multiples/README.md