Date:         Fri, 5 Sep 2003 08:02:37 -0700
Reply-To:     "Choate, Paul@DDS" <pchoate@DDS.CA.GOV>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         "Choate, Paul@DDS" <pchoate@DDS.CA.GOV>
Subject:      Re: Do ... Until
Comments: To: John Whittington <John.W@mediscience.co.uk>
Content-Type: text/plain

Thanks for the pointer John - if it saves typing, then I'm 50% more likely
to apply it!

Of course, GoTo or Link statements allow conditional exiting to specific
points in the program, rather than just the end of the loop, as does Leave.
I won't want to completely give up my old habits.

Paul Choate
DDS Data Extraction
(916) 654-2160

-----Original Message-----
From: John Whittington [mailto:John.W@mediscience.co.uk]
Sent: Thursday, September 04, 2003 6:20 PM
To: Choate, Paul@DDS; SAS-L@LISTSERV.UGA.EDU
Subject: Re: Do ... Until

At 08:37 04/09/03 -0700, Choate, Paul@DDS wrote:

>Why not just explicitly exit the loop?
>
>data _null_;
>  str = '1432 5664 6987';
>
>  do c = '3244','5664','6756';
>     flag1 = index(str, c) > 0;
>     put _all_;
>     if flag1 then goto exit;
>  end;
>  exit:
>run;

Paul, that will certainly work - but, as others have said, it's probably
better to use LEAVE (which was explicitly designed for this job) rather
than using GOTO to jump to a label.  Whilst I'm not specifically aware of
any problems in SAS arising from jumping out of a DO loop with a GOTO, it
feels more comfortable to use the tool designed for the job (and which,
incidentally, saves several keystrokes and a 'line' of code!).

Kind Regards,


John

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