Circular Linked List

A circular linked list is a variation of a linked list where the last node points back to the first node, forming a closed loop. Unlike regular linked lists, it does not contain any Null pointers at the end.

Core Variations

• Circular Singly Linked List
• Circular Doubly Linked List

Advantages/Disadvantages

Advantages

Continuous Loop

Ideal for lists that need to cycle repeatedly without resetting a pointer back to the start.

Fast Insertions

Instantaenous front and back operations (\(O(1)\)) when maintaining a tail pointer.

No Null Pointer Errors

Reduces specific boundary-check bugs.

Disadvantages

Infinite Loop Risk

If the stopping condition (checking if you are back at the starting node) is written incorrectly, code will run forever.

Complex Code

Harder to reverse of split compared to a simple linear list.