One of the most powerful aspects of RobotC is the debugger stream. You can easily debug complex programs with this function while programming. We’ve used this a lot in our WIFI programming, because it sends strings, rather than just characters.
We wrote a quick tutorial on how to use the debugger stream in RobotC here. The tutorial walks you through how to setup RobotC for using the debugger stream, and how it can be used to print different values (like strings, numbers, characters) to the screen.