Understanding insertion after the given node

Inserting a node after the given node is a simple operation. It is similar to inserting after the given node in a singly linked list. For a doubly linked list, we need to update the previous pointer of the newly created node to maintain the bidirectional structure. Let’s examine the two cases that we need to consider.

1. The list is empty

If the list is empty and contains no elements, we cannot find the given node because it does not exist within the list. Inserting a new node after the given node is not possible because there is no reference point within the list to perform the insertion. In such a case, the method would return without making any changes.