Oracle 11g Release 2

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create table city(city_id int,city_name varchar2(25))
begin
 insert into city values(1,'Istanbul');
 insert into city values(2,'Ankara'); 
 insert into city values(3,'Izmir');
end;
/
1 rows affected

DECLARE
  v_list SYS_REFCURSOR;
  v_city_id   city.city_id%TYPE;
  v_city_name city.city_name%TYPE;
BEGIN 
  OPEN v_list FOR
    SELECT city_id, city_name FROM City;
 
  LOOP 
    FETCH v_list
    INTO  v_city_id, v_city_name;
    EXIT WHEN v_list%NOTFOUND;
    DBMS_OUTPUT.PUT_LINE(v_city_id || ' - ' || v_city_name);
  END LOOP;
  CLOSE v_list;  
END;
/
1 rows affected

dbms_output:
1 - Istanbul
2 - Ankara
3 - Izmir