String printing

I have a very stupid, really basic question. While debugging some code I realized I don’t have a clue on how to simply print a very simple string like : “I’am here in your code” to the output console.
I don’t want any formatting or other intelligent printing to screen stuff. Just this basic message. With everything I’ve tried so far it all ends in error messages.
the ‘puts’ opcode is supposed to handle this but I can’t get it to work. All opcodes starting with ‘print’ need additional arguments, which I don’t have…
Documentation is not very extensive, both in the manual or in Flossmanual.
So if someone could enlighten me on the subject I will be very grateful

can use prints, such as:

prints("Hello.\n")