Doubly Linked Lists
Explore how doubly linked lists use two references per node to enable traversal in both directions. Understand their structure, advantages over singly linked lists, and practical Python implementation for efficient navigation and modification.
At this stage, singly linked lists and operations such as insertion, deletion, and traversal have been covered. In a singly linked list, each node stores a value and a reference to the next node. This design supports traversal in the forward direction, one node at a time.
However, singly linked lists have an important limitation. As each node only stores a link to the next node, traversal is only possible in one direction. If we are currently at a node and want to return to the previous node, there is no direct way to do that. We would have to start again from the head and ...