RE: diff btw Procedures and Routines -- RPG400-L

It could be either depending on preference.  But, does it return a selected
date that is chosen by the user?  If it does then I would definitely make it
a procedure because it allows for clearer and cleaner code such as

eval    NewDate = SelectDate(InputDate)

I also think putting procedures into a service program is a very nice and
convenient packaging.  It is a lot easier for a programmer to find a
procedure in a service program than trying to find a program.

It does come down to a personal choice sometimes but for utility type
functions I do prefer putting them into procedures that are packaged in a
service program.

Scott Mildenberger

> -----Original Message-----
> From: Booth Martin [mailto:Booth@MartinVT.com]
> Sent: Thursday, August 15, 2002 10:50 AM
> To: rpg400-l@midrange.com
> Subject: RE: diff btw Procedures and Routines
>
>
> --
> --
> [ Picked text/plain from multipart/alternative ]
> I've been 5 years trying to get this straight and am still
> confused.  Lets
> say I have a utility program that is a pop-up calendar.  The
> parm is a date.
>   Should this be a program or a procedure?
>
>
>
> ---------------------------------------------------------
> Booth Martin   http://www.MartinVT.com
> Booth@MartinVT.com
> ---------------------------------------------------------
>
> -------Original Message-------
>
> From: rpg400-l@midrange.com
> Date: Thursday, August 15, 2002 12:45:09
> To: 'rpg400-l@midrange.com'
> Subject: RE: diff btw Procedures and Routines
>
> A procedure is encapsulated, where a subroutine is not.
>
> That is, a procedure can see variables that it defines, but
> not variables
> that the main program defines. This makes it a lot easier to
> determine what
> a procedure is actually doing and where it's getting it's
> return value(s).
>
> This makes a procedure "stand alone", and can be used in
> other programs with
> little modification (modification required for any File I/O
> may be required)
>
>
> It can be extremely difficult to copy a subroutine to another
> program, as
> you have to determine all the variables the subroutine uses,
> and what these
> are supposed to be set for, etc...
>
> I have been known to break my RPG IV program into Subroutines
> when it starts
> getting too large to group the logic. Whether or not these
> should be broken
> up into Procedures is probably a personal choice. But,
> subroutines that
> calculate a value or such, those I would put into Procedures.
>
> Regards,
>
> Jim Langston
>
> -----Original Message-----
> From: MURALI DHAR [mailto:nmuralidhar@rediffmail.com]
>
> why do we use procedures only in modules in ILE programs?why nt
> subroutines?whats the diff ...plz kindly answer me
> Best regards
> Murali
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