#ifdef

 
Syntax


#ifdef IDname 

#endif

     or

#ifndef IDname

#endif

Description


This statement directs the pre-processor to copy the contents of file between the ifdef and the endif into the source to be compiled by the BASIC compiler, if IDname is defined .  #ifndef copies the statements if IDname has not been defined.

These statements may nest.

Example


#define COMPILETHIS

#ifdef COMPILETHIS    

  ... will now be included

#endif
Differences from other BASICs

  • no equivalent in PBASIC
  • no equivalent in Visual BASIC, but may be done with C-pre-processor
See also