PickBASIC / FlashBASIC

$IFDEF directive

The $IFDEF directive tests for the definition of an identifier in the compiler symbol table.

Syntax

 $IFDEF identifier statements
 {$ELSE statements}
 $ENDIF

Parameter(s)


identifier	Specifies the symbol to be tested. If the symbol is defined in the symbol table (by $DEFINE), the statements following the identifier are executed. If the symbol is not defined in the symbol table (by $DEFINE), the statements in the $ELSE clause are executed if specified. The $ENDIF directive is required.
$ELSE	(Optional) If the symbol is not defined, the statements in the $ELSE clause are executed if specified.
$ENDIF	(Required) The $ENDIF directive marks the end of the $IFDEF directive.

Example(s)

Example 1

PLATFORM

 001 $DEFINE PLATFORM.D3

Example 2

TEST.IFDEF

 001 $INCLUDE PLATFORM
 002 $IFDEF PLATFORM.D3
 003 USER.INFO = OCONV(&#39;&#39;, &#39;U50BB&#39;)
 004 $ELSE
 005 CALL !GET.USERS(&#39;&#39;, &#39;&#39;, &#39;&#39;,USER.INFO,&#39;&#39;)  
 006 $ENDIF
 007 PRINT USER.INFO

$IFDEF directive

Syntax

Parameter(s)

Example(s)

See also