WHILE v17

Syntax

WHILE <expression> LOOP
    <statements>
END LOOP;

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

Example

This example uses the WHILE statement instead of the EXIT statement to determine when to exit the loop:

Note

The conditional expression used to determine when to exit the loop differs when using WHILE versus EXIT. The EXIT statement terminates the loop when its conditional expression is true. The WHILE statement terminates the loop or never begins it 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 following is the output from this example:

Output

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)