Doubly and Circular Linked Lists
📘 Data Structure and Algorithm
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📅 Nov 05, 2025
⏱ Estimated reading time: 1 min
Doubly and Circular Linked Lists
Doubly Linked Lists are linked lists in which each node contains two pointers: one pointing to the next node and one to the previous node. Circular Linked Lists connect the last node back to the first node.
Doubly Linked List Structure
struct Node {
int data;
Node* prev;
Node* next;
};
Advantages of Doubly Linked Lists
- Bidirectional traversal.
- Easy deletion of a given node without traversal from head.
Disadvantages
- Extra memory for an additional pointer.
- More complex insertion and deletion operations.
Circular Linked List
In a circular linked list, the last node points to the first node instead of NULL. It can be singly or doubly linked.
Advantages:
- Can traverse entire list from any node.
- Useful in implementing circular buffers and task scheduling.
Applications
- Music playlist management.
- CPU process scheduling (round-robin).
- Navigation systems.
Conclusion
Doubly and circular linked lists provide more flexibility in traversal and structure compared to singly linked lists, making them valuable in many advanced data management scenarios.
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