Oracle 'open cursor loop fetch into' and 'for in cursor loop'

DECLARE

CURSOR emp IS
SELECT first_name, last_name FROM hr.employees;

my_emp2 emp%ROWTYPE;

fir_name hr.employees.first_name%TYPE;

BEGIN

WITH emp_temp AS
(
SELECT first_name FROM hr.employees WHERE first_name = 'Ellen'
)
SELECT first_name INTO fir_name FROM emp_temp;

DBMS_OUTPUT.PUT_LINE( 'first_name -- ' || fir_name );

OPEN emp;

LOOP

FETCH emp INTO my_emp2;
EXIT WHEN emp%NOTFOUND;

DBMS_OUTPUT.PUT_LINE( 'fetch -- ' || my_emp2.first_name || '-' || my_emp2.last_name );

END LOOP;

CLOSE emp;

FOR eachemp IN emp LOOP
DBMS_OUTPUT.PUT_LINE( 'for -- ' || eachemp.first_name || '-' || eachemp.last_name );
END LOOP;

END;
/

SELECT * FROM  V$OPEN_CURSOR