I realize this is a bit of a change in subject (and it's not as if we need yet
another one), but I avoid this construction. My phobia is based on an extreme
example: In their zeal never to use GOTOs, I've frequently seen programmers
write paragraphs like this:
PERFORM 1050-LOOP VARYING JC FROM 1 BY 1 TO 99
1050-LOOP.
IF X < 1000
IF FIRST-NAME NOT = "ROBERT"
IF TYPE = 195
IF SO-ON
IF SO-FORTH
EXECUTE 1050-SUCH-AND-SUCH
END-IF
END-IF
END-IF
END-IF
END-IF
Gives me a headache to try to evaluate that. Much better, in my opinion, to
introduce ONE LOUSY "GOTO EO-PARAGRAPH" like this:
PERFORM 1050-LOOP THRU 1059-LOOP VARYING JC FROM 1 BY 1 TO 99
1050-LOOP.
IF X > 999 GOTO 1059-LOOP.
IF FIRST-NAME = "ROBERT" GOTO 1059-LOOP.
IF TYPE <> 195 GOTO 1059-LOOP.
IF NOT SO-ON GOTO 1059-LOOP.
IF NOT SO-FORTH GOTO 1059-LOOP.
EXECUTE 1050-SUCH-AND-SUCH
1059-LOOP.
Keep in mind I haven't programmed in COBOL since Y2K; I had to look up the
syntax, I probably got part of it wrong nonetheless, and I'll bet there are
easier ways to do it nowadays. In REXX, for example, they have the ITERATE
statement:
do jc=1 to 99
if x>99 then iterate
if firstname='ROBERT' then iterate
if type<>195 then iterate
if \soon then iterate
if \soforth then iterate
call suchandsuch
end
However you do it, I vastly prefer skip-to-next-item over nested Ifs. But I
confess that one single nested IF is not going to give me a headache; I just
react when I see one. Not your fault :).
---
Bob Bridges, robhbrid...@gmail.com, cell 336 382-7313
/* In an emergency, a drawstring from a parka hood can be used to strangle a
snoring tent mate. -"Camping Tips" */
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf
Of Gibney, Dave
Sent: Friday, June 5, 2020 16:17
Using OP
IF TVOLL (IND1) NOT = HIGH-VALUE
AND SMOD (IND1) = 'B' OR 'R'
I would do
IF TVOLL (IND1) NOT = HIGH-VALUE
IF SMOD (IND1) = 'B' OR 'R'
Do the stuff
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