Where does require look for modules?

[gregvaughn]

@7stud

Okay, that worked…but it also worked without the require statement, so I guess I don’t understand what require does yet:

As for the code you’ve written, you don’t need a require statement at all. Requires are for loading macros before they’re used, which your function is not (its just a plain function). You can remove the require MyMath and everything will still work fine.

require in Elixir is not like require in your prior language. That quote you included from @mgwidmann explains it well. require is about macros, and you’re not using macros.

Edit to add:
The getting started guide is a good place to … well .. get started. It covers require in more depth here: https://elixir-lang.org/getting-started/alias-require-and-import.html#require