WHILE v13

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WHILE <expression> LOOP
    <statements>
END LOOP;

The WHILE statement repeats a sequence of statements so long as the condition expression evaluates to TRUE. The condition is checked just before each entry to the loop body.

The following example contains the same logic as in the previous example except the WHILE statement is used to take the place of the EXIT statement to determine when to exit the loop.

Note

The conditional expression used to determine when to exit the loop must be altered. The EXIT statement terminates the loop when its conditional expression is true. The WHILE statement terminates (or never begins the loop) when its conditional expression is false.

DECLARE
    v_counter       NUMBER(2);
BEGIN
    v_counter := 1;
    WHILE v_counter <= 10 LOOP
        DBMS_OUTPUT.PUT_LINE('Iteration # ' || v_counter);
        v_counter := v_counter + 1;
    END LOOP;
END;

The same result is generated by this example as in the prior example.

Iteration # 1
Iteration # 2
Iteration # 3
Iteration # 4
Iteration # 5
Iteration # 6
Iteration # 7
Iteration # 8
Iteration # 9
Iteration # 10
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FOR (integer variant)