Lecture -08 Double Linked List and its code implementation

🔗 In this video, we break down one of the most powerful and versatile data structures — the Doubly Linked List! Unlike a singly linked list that only moves in one direction, a doubly linked list gives each node TWO pointers — a NEXT and a PREV — making traversal bidirectional. ━━━━━━━━━━━━━━━━━━━━━━ 📌 WHAT YOU'LL LEARN: ━━━━━━━━━━━━━━━━━━━━━━ ✅ What is a Doubly Linked List? ✅ Node structure: prev → data → next ✅ How it differs from a Singly Linked List ✅ Insertion at Head & Tail — O(1) ✅ Deletion of a node — O(1) with a reference ✅ Forward & Backward Traversal — O(n) ✅ Memory trade-offs (extra pointer per node) ✅ Real-world use cases: Browser history, Undo/Redo, LRU Cache ━━━━━━━━━━━━━━━━━━━━━━ ⚡ KEY PROPERTIES: ━━━━━━━━━━━━━━━━━━━━━━ - Traversal → Both directions O(n) - Deletion → O(1) with node reference - Extra memory → One extra prev pointer per node - Reverse access → ✓ Always possible - Use cases → Browser history, Undo-Redo, Deque ━━━━━━━━━━━━━━━━━━━━━━ 📂 DATA STRUCTURES SERIES: ━━━━━━━━━━━━━━━━━━━━━━ #1 - Arrays #2 - Stacks #3 - Queues #4 - Hash Tables #5 - Binary Trees #6 - Binary Search Trees #7 - Circular Linked List #8 - Doubly Linked List ← YOU ARE HERE #9 - Coming soon... ━━━━━━━━━━━━━━━━━━━━━━ 🏆 FOCUS. DISCIPLINE. CONSISTENCY. SUCCESS. ━━━━━━━━━━━━━━━━━━━━━━ 👍 Like if this helped | 🔔 Subscribe for weekly DSA content 💬 Comment your questions below! #LinkedList #DoublyLinkedList #DataStructures #DSA #Coding #Programming #ComputerScience #LeetCode #CodingInterview #LearnToCode