SQL & PL/SQL

I am facing problem using the continue statement, here is a mock-up

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DECLARE
x NUMBER := 0;
BEGIN
LOOP -- After CONTINUE statement, control resumes here
DBMS_OUTPUT.PUT_LINE ('Inside loop: x = ' || TO_CHAR(x));
x := x + 1;

IF x < 3 THEN
CONTINUE;
END IF;

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;
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when I execute this in in Quest script runner, I get an error message saying 'Identifier CONTINUE must be declared'