title: An exception Error is here. How should i deal with it in doubly linked list?
body: <p><a href="https://i.stack.imgur.com/oXuDn.png" rel="nofollow noreferrer">Doubly Linked List</a></p>
  <p>Here I wrote A deletion Function for deletion of a node of doubly linked list. But its showing this exception . I don't know how to deal with any exception.</p>