In the SAS programs that you write, you might find that
you need to reference the same variable, data set, or text string
title "Total Sales for 2002";
proc print data=perm.sales2002;
Then, you might need to change the references in
your program in order to reference a different variable, data set,
or text string. Especially if your programs are lengthy, scanning
for specific references and updating them manually can take a lot
of time, and it is easy to overlook a reference that needs to be updated.
title "Total Sales for 2001";
proc print data=perm.sales2001;
If you ...