{{fbdoc item="title" value="#IFDEF"}}----
Preprocessor conditional directive

{{fbdoc item="syntax"}}##
	**#ifdef** //symbol//
		' Conditionally included statements
	[[KeyPgPpendif #endif]]
##
{{fbdoc item="desc"}}
	Conditionally includes statements at compile time.
	
	Statements within the ##**#ifdef**...[[KeyPgPpendif #endif]]## block are included if ##//symbol//## is defined and excluded (ignored) if ##//symbol//## is not defined.
	
	##**#ifdef** //symbol//## is equivalent to ##[[KeyPgPpif #if]] [[KeyPgDefined defined]] (//symbol//)##

{{fbdoc item="ex"}}
{{fbdoc item="filename" value="examples/manual/prepro/ifdef.bas"}}%%(freebasic)
#DEFINE _DEBUG
#IFDEF _DEBUG
	' Special statements for debugging
#ENDIF
%%

{{fbdoc item="diff"}}
	- New to Freebasic

{{fbdoc item="see"}}
	- ##[[KeyPgPpdefine #define]]##
	- ##[[KeyPgPpmacro #macro]]##
	- ##[[KeyPgPpif #if]]##
	- ##[[KeyPgPpelse #else]]## 
	- ##[[KeyPgPpelseif #elseif]]## 
	- ##[[KeyPgPpendif #endif]]## 
	- ##[[KeyPgPpifndef #ifndef]]##
	- ##[[KeyPgPpundef #undef]]##
	- ##[[KeyPgDefined defined]]##

{{fbdoc item="back" value="CatPgPreProcess|Preprocessor"}}