Can anyone tell what \r does please

I have been looking at peoples scripts and I have seen a \r next to their \n's can anyone tell me what it does please

I believe this has to do with difference between "return" and "line feed"

When scripting I have never needed anything ither than \n to break the line.

Thank you again

AFAIK the "\r\n" indicates a line feed in files on windows. Other OS like Unix use "\n", and I think on MacOS it is "\r", though I'm not completely sure, since they now also changed the framework of their OS. Can anyone more Mac-savy than me confirm what I just said?