RPG/400 – return parameters
Since we can pass parameters to a RPG program using *ENTRY and PLIST, Is it possible for a RPG program to return back any values to the calling program?
Suppose I want to have a module which checks if a year is leap or not, I am bound to have this as a Subroutine and not as a program being called from different other programs?
Is there a way out to handle such kind of modules?
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ASKED:
May 22, 2008 8:07 AM
UPDATED:
April 21, 2010 8:28 AM
Answer Wiki:
Hi,
You can return values to calling programs in RPG, <a href="http://publib.boulder.ibm.com/infocenter/systems/scope/i5os/index.jsp?topic=/rzasd/sc092508989.htm&tocNode=int_236824">RPG PARM Details</a>
If you have a subroutine for checking leap year that you want to use often, you could incorporate this module into a service program which you could use from your other programs, or as a module that you could bind when you need it.
Hope this helps,
Martin Gilbert.
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If a program is called with a parameter list (*ENTRY/PLIST), the program can (usually) simply change the value of a parameter. When the called program ends, the calling program will see that the parameter variable has a new, changed value.
Programs are called with parameters 'by reference' by default, rather than 'by value'.
Tom
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