Oracle 12c parsing table row by row with for and switch case

Function that will be used:

CREATE OR REPLACE FUNCTION fun2( p_c_id IN CHAR, p_name IN VARCHAR2, p_regio IN NUMBER) 
RETURN VARCHAR2 
AS 
PRAGMA AUTONOMOUS_TRANSACTION;
BEGIN
  INSERT INTO CON (COUNTRY_ID, COUNTRY_NAME, REGION_ID)
  VALUES ( p_c_id, p_name, p_regio);
COMMIT;
RETURN p_name || ' mod';
END;
/

Parse row by row using CASE SWITCH:

SELECT REGION_ID,
       CASE region_id
           WHEN 2 THEN fun2(country_id, country_name, region_id )
           WHEN 4 THEN 'four'
           ELSE 'not'
       END AS c
FROM countries

Parse row by row using loop

BEGIN
FOR c IN (SELECT field1, field2 FROM mytable) 
  LOOP 
    my_proc(c.field1, c.field2);
  END LOOP;
END;