#ifkeyword

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.

Remarks

Differences from QB

• New to FreeBASIC
  
  

See also

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

Example

#define DEBUG_LEVEL 1

#if (DEBUG_LEVEL >= 2)

  ' This line is not compiled since the expression is False

  Print "Starting application"

#endif

Reference

• Documented in KeyPgPpif.html