Hi everyone,    I am very new in SAS. I am trying to loop a SAS macro.   %let E1 = APPLE; %let E2 = YAHOO; %let E3 = SAS; .....     %MARCO FILTER_NAME(VAR1=. VAR2=); proc SQL; ... %MEND FILTER_NAME;     %MACRO LOOP;      %do i=1 %to 3;      %FILTER_NAME(VAR1=filename_&&E&i, VAR2 = output_filename_&&E&i )  /*trying to pass the variable E1 with name Apple inside here*/      %end; %MEND LOOP;       Something is wrong above. Anybody know how? ... View more