The next pointer of N will point to the node N itself as there is only one node. When there are no nodes in circular list and the list is empty, the last pointer is null, then we insert a new node N by pointing the last pointer to the node N as shown above. Let us see each of these insertion operations using a pictorial representation below. We can insert a node in a circular linked list either as a first node (empty list), in the beginning, in the end, or in between the other nodes. We will discuss each of the operations in detail now. The circular linked list supports insertion, deletion, and traversal of the list. This wouldn’t have been possible if we had pointed the external pointer to the first node. This is because the last points to the last node while last->next points to the first node. Hence last->next will point to the first node in the linked list.īy doing this we ensure that when we insert a new node at the beginning or at the end of the list, we need not traverse the entire list. In order to implement the circular linked list, we maintain an external pointer “last” that points to the last node in the circular linked list. We can declare a node in a circular linked list as any other node as shown below: struct Node In a doubly circular linked list, the previous pointer of the first node is connected to the last node while the next pointer of the last node is connected to the first node. The arrangement shown below is for a singly linked list.Ī circular linked list can be a singly linked list or a doubly linked list.
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