IF (If Expression is True)

IF starts a conditional assembly statement, which is ended by the corresponding ENDIF conditional assembly directive. Each IF directive must be ended by a matching ENDIF directive.

Syntax

IF Expression
   .
   .
   .
[ELSEIFxx] (optional)
   .
   .
   .
[ELSE] (optional)
   .
   .
   .
ENDIF

Remarks

If the IFxx conditional assembly statement is not ended by an ENDIF directive, an unterminated conditional message is produced by the assembler. An ENDIF without a matching IF causes an error. ENDIF does not have an operand.

Note: The conditional directives can be nested to any level. They are not limited to use within a macro. Any operand to a conditional must be known on pass 1 to avoid errors and incorrect evaluation.

Example

IF debug
     EXTERN dump:FAR
     EXTERN trace:FAR
     EXTERN breakpoint:FAR
ENDIF

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