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Ifdef
Paul Squires edited this page Sep 19, 2026
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Home › Preprocessor › #ifdef
Preprocessor conditional directive
#ifdef symbol
' Conditionally included statements
#endifConditionally 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)
- New to Freebasic
#define _DEBUG
#ifdef _DEBUG
' Special statements for debugging
#endifCategory: Preprocessor
Kind: keyword
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