title: Exit a loop with NOT_FOUND when ITEM_ID not found
body: <ol>
  <li><p>I need to break out of the loop or not perform a loop when ITEM_ID is not found:</p>
  
  <pre><code>BEGIN
  FOR item IN(SELECT ITEM.ITEM_ID,
  ITEM.ITEM_DESC,
  INVENTORY.INV_PRICE
  FROM ITEM
  INNER JOIN INVENTORY
  ON ITEM.ITEM_ID    = INVENTORY.ITEM_ID
  WHERE ITEM.ITEM_ID = '1'
  ORDER BY ITEM.ITEM_ID,
  INVENTORY.INV_PRICE)
  LOOP
  DBMS_OUTPUT.PUT_LINE(
  item.ITEM_ID||' '||item.ITEM_DESC||' ' ||item.INV_PRICE);
  END LOOP;
  END;
  </code></pre></li>
  </ol>
  
  <p>Also, I need to print out something like <code>DBMS_OUTPUT.PUT_LINE('Item not found!');</code></p>