Check if a Variable is Null or not

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From: SAS_learner on 8 Mar 2010 12:56

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Hello all,

I can see and check if a dataset is missing or not using something like
this,

%let dsid=%sysfunc(open(work.test,in));
%let nobs=%sysfunc(attrn(&dsid,nobs));
%if &dsid > 0 %then %let rc=%sysfunc(close(&dsid));

if there something similar that to check to see if there is a Variable
present is Null or not and to Print that variable in Proc Report ??

Thanks
SL

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