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#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​

\