#undef

Syntax

#undef *IDname *

Description

This statement directs the pre-processor to forget the word IDname for pre-processing. 

So #ifdef IDname will now evaluate to FALSE.

Example

\

#define
COMPILETHIS

  '...

#ifdef COMPILETHIS

  '... will now be included

#endif

#undef
COMPILETHIS

#ifdef COMPILETHIS

   '... will now
not 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

\

• #ifdef\