Notice the use of the macro PRINT( ) to save typing (and typing errors!). Preprocessor macros are traditionally named with all uppercase letters so they stand out – you’ll learn later that macros can quickly become dangerous (and they can also be very useful).

The arguments in the parenthesized list following the macro name are substituted in all the code following the closing parenthesis. The preprocessor removes the name PRINT and substitutes the code wherever the macro is called, so the compiler cannot generate any error messages using the macro name, and it doesn’t do any type checking on the arguments (the latter can be beneficial, as shown in the debugging macros at the end of the chapter).