My instructor in introductory programming is teaching us to use char[size] to hold strings instead of string. Is it better programming etiquette to use a char array instead of string type? I know string isn't a fundamental data type, and it's possible that is why we aren't going to learn it, or maybe learning char[size] for string is a way to introduce arrays for ease of learning later in the course. I was just wondering, if you program professionally, which is better to use in general?
Your instructor is probably following some prehistoric (that is, pre-1998) C++ teaching program. All good textbooks (Accelerated C++, C++ Primer, Programming Principles and Practice) explain strings first.
And yes, strings are better to use in general: see C++ Coding Standards, rule 77 "Use vector and string instead of arrays"