Using cursor only update first two row where NO=NO*10 - DBMS (Cursor)

declare

cursor abc is select no,name from empmaster;

rec abc%rowtype;

begin

if abc%isopen

then

open abc;

end if;

for rec in abc

loop

exit when abc%rowcount>2 or abc%notfound;

update empmaster set no=no*10 where no=rec.no;

end loop;

end;