RE: diff btw Procedures and Routines

[Jim Langston <jlangston@xxxxxxxxxxx>]

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