PL/SQL SELECT INTO Clause

create or replace function auth_Name
( v_auth_state IN author.author_state%type)
return varchar2

as
    v_authName author.author_last_name%type;
    
    begin
    select author_last_name into v_authName
    from author
    where author_state = v_auth_state;

    return v_authName;

    exception

    when TOO_MANY_ROWS
    then return 'Too Many Authors in that State';

    when NO_DATA_FOUND
    then return 'No Authors in that State';

    when others
    then raise_application_error(-20011,'Unknown Exception in authName Function');

end;