Doubly Linked List
Learn about doubly linked lists, where each node points to both its next and previous neighbors, allowing bidirectional traversal.
Learn about doubly linked lists, where each node points to both its next and previous neighbors, allowing bidirectional traversal. This hands-on tutorial focuses on practical implementation of doubly linked list concepts.
Doubly Linked List
A Doubly Linked List (DLL) is a complex type of linked list in which each node contains a pointer to the next node as well as the previous node.
Structure of a Node
In a DLL, a node consists of three parts:
- Data: The value stored in the node.
- Next Pointer: Points to the next node in the sequence.
- Prev Pointer: Points to the previous node in the sequence.
class Node:
def __init__(self, data):
self.data = data
self.next = None
self.prev = None
Advantages of Doubly Linked List
- Bidirectional Traversal: You can traverse in both forward and backward directions.
- Easier Deletion: Deleting a node is more efficient if you have a pointer to the node to be deleted, as you don't need to find the previous node.
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Quiz
Quiz
Question 1 of 1How much extra memory does a Doubly Linked List node use compared to a Singly Linked List node?