PICAXE

Name:
#ifndef
Syntax:

#IFNDEF label

(code)

#ENDIF


#IFNDEF label

(code)

#ELSEIFNDEF label2

(code)

#ELSE

(code)

#ENDIF

Description:

Conditionally compile code depending on whether a label is not defined (#ifndef) or is defined (#ifdef).

Applies To:
All
See Also:
Related Create:
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    #ifndef example

    Example of how to use #define and #ifndef

    Code Example:
    #define clock8

#ifdef clock8
  let b1 = 8
#else
  let b1 = 4
#endif

#undefine clock8

#ifndef clock8
  let b2 = 4
#else
  let b2 = 8
#endif
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