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Delete the last node from doubly linked list

A doubly linked list is a data structure that consists of a set of nodes, where each node contains a value and two pointers that point to the previous and next nodes in the list. Deleting the last node from a doubly linked list means removing the node that appears at the end of the list.

To delete the last node from a doubly linked list, you would typically perform the following steps:

  1. Check if the list is empty: If the list is empty, there is no last node to delete, and you can simply return.

  2. Traverse the list to the last node: Start at the head of the list and follow the next pointers until you reach the last node in the list.

  3. Update the previous node's "next" pointer: Once you have found the last node, update the "next" pointer of the previous node to point to NULL instead of the last node.

  4. Free the memory allocated to the last node: Finally, free the memory allocated to the last node.

If the doubly linked list also stores data in the nodes, you would typically want to return the value of the deleted node so that it can be used or displayed as needed.

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