The head node is the node at the beginning of the list, and the tail node is the node at the end of the list. A doubly linked list is a type of linked list that has both a next reference and a previous reference for each node. Each node contains data and two links (or pointers) to the next and previous nodes in the list.
Doubly linked list series#
Like a singly linked list, a doubly linked list is comprised of a series of nodes. In the search function a value is passed as an argument and its node is returned if found, otherwise a message says "No such element in the list" and nullptr is returned. A conceptual overview of Doubly Linked Lists. This is because to delete a node we need access to the node to be. In this way, the nodes of the list are (doubly-)linked. Deletion of nodes is easier compared to a singly linked list. acting as the node that follows the last node in the list and that precedes the first node in the list. The search function for doubly linked list is same as the search function for singly linked list. It allows traversing in both forward and backward directions because of the next and previous pointers, unlike the singly linked list, which allows traversing in only one direction. The three basic operations supported by a linked list are searching, insertion and deletion.
Node containing 5 is head and node containing 15 is tail.