nobs.sas

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%MACRO nobs(
   data
);
%local dsid nobs;
%let nobs=;
%let dsid=%sysfunc(open(&data));
%if &dsid>0 %then %do;
   %let nobs=%sysfunc(attrn(&dsid,nlobs));
   %let dsid=%sysfunc(close(&dsid));
%end;
&nobs
%MEND nobs;