#IFDEF

• Source: https://www.freebasic.net/wiki/wikka.php?wakka=KeyPgPpifdef
• Last revised: 2023-10-02

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Preprocessor conditional directive

Syntax

#ifdef symbol

' Conditionally included statements

#endif

Description

Conditionally includes statements at compile time.

Statements within the #ifdef...#endif block are included if symbol is defined and excluded (ignored) if symbol is not defined.

#ifdef symbol is equivalent to #if defined (symbol)

Examples

start GeSHi

#DEFINE _DEBUG
#IFDEF _DEBUG
    ' Special statements for debugging
#ENDIF

end GeSHi

Differences from QB

• New to Freebasic

See also

• #define
• #macro
• #if
• #else
• #elseif
• #elseifdef
• #elseifndef
• #endif
• #ifndef
• #undef
• defined

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