If statement and scalar variable

DECLARE
lv_purchase_num NUMBER (3);
lv_rating CHAR (4);
BEGIN
IF lv_purchase_num > 200 THEN
lv_rating  := ‘HIGH’;
ELSEIF lv_purchase_num < 200 AND lv_purchase_num > 100 THEN
lv_rating  := ‘MID’;
ELSE
lv_rating  := ‘LOW’;
END IF;
DBMS_OUTPUT.PUT_LINE(lv_rating);
END;
/