All,
I have a simple question. How can one perform a logical test to validate if a macro variable has missing value ?
For e.g.:
%Let a = .;
%Put &a.;
%If &a = %str() %Then
%Do;
%Put "1";
%End;
I thought something like this, but doesn't get me too far.
@Astounding ,
Thank you for your response. May I ask you to offer a little more clarity ,
%Let a = . ;
%if %length(&a) %then
%do;
%put 1;
%end;
%else;
%put 0;
%end;
This returns an error. Can you point as to what is wrong ? Additionally, can you point me to the paper you are referring to ?
@UdayGuntupalli wrote:
(...) Additionally, can you point me to the paper you are referring to ?
Just for completeness, this is (most likely) the paper Astounding referred to: https://support.sas.com/resources/papers/proceedings09/022-2009.pdf
%If &a = %Then %Do;%Put "1";%End;
Are you ready for the spotlight? We're accepting content ideas for SAS Innovate 2025 to be held May 6-9 in Orlando, FL. The call is open until September 25. Read more here about why you should contribute and what is in it for you!
Learn how use the CAT functions in SAS to join values from multiple variables into a single value.
Find more tutorials on the SAS Users YouTube channel.