And with the format defined use
%sysfunc(putc(&sysuserid. , $fullname.))
Just about anywhere you would be expected to need the name. If the code would expect to be in quotes, such as Title/footnote statement, filename, or text value then make sure the quotes are double quotes so the macro values resolve.
Title "Exercise One Results by %sysfunc(putc(&sysuserid. , $fullname.)) ";
Or for the truly lazy: something like this
%let sname = %sysfunc(putc(&sysuserid. , $fullname.));
And use the value of &sname:
Title "Exercise Two Results by &sname.";
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