Using multiple. gs files in Google App Script

So I am a newbie and learning app script. Is there a way where I can export and import functions from different .gs files?

In my code.gs, I have the code:

function test() {
    callMe("hello world")
}

and I have a helper.gs file where some functions live.

function callMe(msg) { Logger.log(msg) }
function quit() { Logger.log("quitting") }

Now, when I run the script, it throws an error: ReferenceError: msg is not defined

Basically, I want to create helper functions and then export them so as to organize my code inside code.gs.

Answer

The issue is that you are not actually executing test.

Make sure the test function is selected for execution before you click the run button: