Name 

Description 

Conditional Compilation 

The compiler supports conditional compilation by replacing the appropriate source-code lines with a blank line. The lines thus ignored are those beginning with # (except the #if, #ifdef, #ifndef, #else, #elif, and #endif directives), as well as any lines that are not to be compiled as a result of the directives. All conditional compilation directives must be completed in the source or include file in which they are begun. 

#if, #elif, #else, And #endif 

Syntax  

#ifdef And #ifndef 

Syntax  

Defined 

Syntax