I think it's important to understand that println! is special (Rust forcing the ! goes a long way for that and is IMO an excellent decision, I hate "fake" macro

I think it's important to understand that println! is special (Rust forcing the ! goes a long way for that and is IMO an excellent decision, I hate "fake" macro functions in C). Although simply saying "this is a macro call, not a real function which is why it can do things a normal function call couldn't" is probably good enough for an intro.