Elixir Getting Started: Scripted mode

Hi! Going through the elixir-lang.org getting started guides and have a question about Scripted mode section.

You can see this point in the guide:

When executed, both extensions compile and load their modules into memory, although only .ex files write their bytecode to disk in the format of .beam files.

And further:

And execute it as:

$ elixir math.exs

The file will be compiled in memory and executed, printing “3” as the result. No bytecode file will be created.

So, the question is here: one can do the same thing with *.ex extension and run it with:

elixir math.ex

And in this case I also see no compiled *.beam file.

Guess *.exs compilation will not write *.beam file to the disk if you do it with mix. Is it correct?

Thanks!