How does the AddControllerPitchInput function in the example code control the camera?

How does the AddControllerPitchInput function in the example code control the camera? I can’t find a link between the two.
Thanks,
Jack

Cmon Lewis, what example code?

FYI read

and

The FPS and third person C++ examples I mean.

I still don’t understand. Can you post the links to those examples?