one more question, how do I make a function that returns nothing without throwing an Exception?

Nothing indicates that it essentially halts the program. You can throw an exception or call system exit. I believe there is a kotlin function called exit that returns nothing, doing exactly that If you are referring to Java's void, then return unit (you don't have to specify that in the method header)

i want the formet. to exit. but i don’t want the program to exit. i just want to simulate an exception without throwing an exception (so only that thread stops). so like if im making a discord bot, it stops the program there, not everywehre

If you throw an exception and no one catches it only that thread stops.

Ok so, just as an idea you can suspend execution and never resume it i.e. try to apply coroutines

If you want, you can also use boolean returns to propagate responses. As in return true to continue, false otherwise etc

Alan thanks for the great idea!