Any character that shows up for formatting with no effect on code logic. This includes:
\thorizontal tab\nnewline\vvertical tab\fform feed\rcarriage return
One-Line Programs
You can actually write entire programs in just one line, EXCLUDING the #include statements
#include statements must always be seperated by newlines
#include <iostream>
#include <string>Style Guides
Because C++ is white space independent, there have been many style guides Google Style Guide