#IF

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

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Preprocessor conditional directive

Syntax

#if (expression)

' Conditionally included statements

#endif

Description

Conditionally includes statements at compile time.

Statements contained within the #if / #endif block are included if expression evaluates to True (non-zero) and excluded (ignored) if expression evaluates to False (0).

This conditional directive differs from the If conditional statement in that #if is evaluated at compile-time and If is evaluated at run-time.

Examples

start GeSHi

#define DEBUG_LEVEL 1
#IF (DEBUG_LEVEL >= 2)
  ' This line is not compiled since the expression is False
  Print "Starting application"
#ENDIF

end GeSHi

Differences from QB

• New to FreeBASIC

See also

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

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