IFDEF - Execute If Symbol has Been Defined

MPASM Assembler

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IFDEF - Execute If Symbol has Been Defined

Syntax

ifdef <label>

Description

If <label> has been previously defined, usually by issuing a #define directive or by setting the value on the MPASM assembler command line, the conditional path is taken. Assembly will continue until a matching else or endif directive is encountered.

Example

#define testing 1 ; set testing "on"

:

ifdef testing

<execute test code> ; this path would be executed.

endif

See Also

#DEFINE #UNDEFINE ELSE ENDIF IFNDEF

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