1. Database Programming Using Oracle 11g
Iterative Control-II

2. Iterative Control-II Iterative Control-II: Continue Statement
Conditionally Exit from current iteration of loop
Statements after continue are skipped
Control is transfer to next iteration
Must be inside loop

3. Iterative Control-II
Implementing Continue Statement with Basic Loop

4. Iterative Control-II DECLARE x NUMBER := 0; BEGIN LOOP
DBMS_OUTPUT.PUT_LINE ('Inside loop: x = ' || TO_CHAR(x));
x := x + 1;
IF x < 3 THEN
CONTINUE;
END IF;

5. Iterative Control-II
DBMS_OUTPUT.PUT_LINE ('Inside loop, after CONTINUE: x = ' || TO_CHAR(x));
EXIT WHEN x = 5;
END LOOP; DBMS_OUTPUT.PUT_LINE (' After loop: x = ' || TO_CHAR(x));
END;

6. Iterative Control-II Continue When Statement
Unconditionally Exit from current iteration of loop
Statements after continue are skipped
Control is transfer to next iteration
Must be inside loop

7. Iterative Control-II
Implementing Continue WHEN with Loop

8. Iterative Control-II DECLARE x NUMBER := 0; BEGIN LOOP
DBMS_OUTPUT.PUT_LINE ('Inside loop: x = ' || TO_CHAR(x));
x := x + 1;
CONTINUE WHEN x < 3;

9. Iterative Control-II DBMS_OUTPUT.PUT_LINE
('Inside loop, after CONTINUE: x = ' || TO_CHAR(x));
EXIT WHEN x = 5;
END LOOP;
DBMS_OUTPUT.PUT_LINE (' After loop: x = ' || TO_CHAR(x));
END;

10. Iterative Control-II
Implementing Continue WHEN with For Loop

11. Iterative Control-II declare val number(3):=3; BEGIN
FOR i IN LOOP
dbms_output.put_line('i=' || TO_CHAR(i));
CONTINUE WHEN (i+1) = val;
dbms_output.put_line('Did not jump to the top of the loop');
END LOOP;
END;

12. Iterative Control-II Nested Loops Loop within loop
Any type of loop can be nested within any other or same type of loop
Again one iteration of main loop complete inner loop is executed

13. Iterative Control-II
Syntax for Nested Loops

14. Iterative Control-II LOOP – Main Loop Sequence of statements1
LOOP – Nested or inner loop
Sequence of statements2
END LOOP;
END

15. Iterative Control-II
Implementing Nested Loops-I

16. Iterative Control-II BEGIN FOR v_outerloopcounter IN 1..2 LOOP
FOR v_innerloopcounter IN 1..4
DBMS_OUTPUT.PUT_LINE('Outer Loop counter is ' || v_outerloopcounter || ' Inner Loop counter is ' || v_innerloopcounter);
END LOOP;
END LOOP; END;

17. Iterative Control-II
Implementing Nested Loops-II

18. Iterative Control-II DECLARE v_counter1 INTEGER:=0;
BEGIN
WHILE v_counter1 < 3 LOOP
DBMS_OUTPUT.PUT_LINE('v_counter1 : ' || v_counter1);
LOOP DBMS_OUTPUT.PUT_LINE('v_counter2: ' || v_counter2);

19. Iterative Control-II v_counter2 := v_counter2 + 1;
EXIT WHEN v_counter2 >= 2;
END LOOP;
v_counter1 := v_counter1+1;
END;