What is the proper name for doing debugging by adding 'print' statements [closed]

Answer 1

I embedded systems its often the only method to instrument the code. Unfortunately printing takes time and effects the real-time flow of the system. So we also instrument via "tracing" where information about the state of the system (function entry exit etc) is written to a internal buffer to be dumped and parsed later. Real embedded programmers can debug by blinking an LED ;)