Date:         Mon, 19 Oct 1998 08:21:03 -0500
Reply-To:     hwang@ZSASSOCIATES.COM
Sender:       "SAS(r) Discussion" <SAS-L@UGA.CC.UGA.EDU>
From:         hongjie Wang <hwang@ZSASSOCIATES.COM>
Subject:      macro question
Content-type: text/plain; charset=us-ascii

Dear friends, I have a macro question, do the following two segments of
code equivalent?A
 
(1). %macro test(datset);
       data _null_;
      if &datset eq " " then call symput('datset,', '_LAST_');
      run;
     ...
    ...
 
(2). %macro test(datset);
%if %datset eq %str() %then %let datset=_LAST;
 ...
...
 
Also, is it legal to do the following:
 
(3) data _null_;
         if &datset eq %str() then call symput('datset', '_LAST');
 
Thanks,
 
Hongjie Wang