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Nope. Depends on the language implementation so RPG, MI Assembler, and
C can have optional parameters although they provide different
mechanisms for determining how many parameters were passed. CL cannot
although CLLE can but there is no direct language support for
determining the number of parameters passed. COBOL can accept optional
parameters but provides no way to determine how many were passed.
I have a number of CL (not CLLE) programs that accept up to N parameters,
but to which I pass less than N under certain circumstances. The program
can determine whether "more" parameters are needed by the values in the
supplied data. I don't recommend this approach because the maintainer can
be easily confused, but I can say that it does work.
Also, a MONMSG MCH3601 (I think it is) will handle the case where an
unpassed parameter is referenced. Though that's a significant hit on
performance and joblog size. Don't do it. (But you can, and that's the
point I wanted to make.)
Regards,
Dennis Lovelady
http://www.linkedin.com/in/dennislovelady
--
"I believe that this country's policies should be heavily biased toward
nondiscrimination."
-- US President Bill Clinton
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