X.previous points to NULL, and X.Next points to Head or to A. So as we can see, to insert an element at front, we need to change pointers of A Node.Įarlier: Head points to A and A.previous points = NULL. Now after we insert X inside this Doubly Linked List: X ⇆ A ⇆ B ⇆ C There can be 4 different ways of inserting a new Element inside a Doubly Linked List, and we will see each of these ways in detail below: Insert FirstĪ Node can be inserted as the first element in the Doubly Linked List. If we go with Arrays, those will be represented as īut this shifting of rest of the elements is not required if the inserting is to be done inside the doubly linked list. I would suggest going through the Linked List concepts before jumping ahead with Doubly Linked List.īut to summarize, say we have 3 elements, We can conclude that a doubly linked list is a complex type of linked list where a node contains a pointer to the previous as well as the next node in the sequence. Different operations of Doubly Linked List.Īs you can guess, Doubly Linked List is an enhancement done on top of Linked List Data Structures. Different from a singly linked list, a doubly linked list allows us to go in both directions - forward and reverse. A doubly linked list has more efficient iteration, particularly if you need to ever iterate in reverse and more efficient deletion of particular nodes.Each node consists of data elements with links to the next. This article tells about the working of the Doubly Linked List. A doubly linked list is a data structure consisting of a group of nodes linked together linearly. A Doubly Linked List (DLL) contains an extra pointer, typically called previous pointer, together with next pointer and data which are there in singly.Doubly Linked List is a variation of Linked list in which navigation is possible in both ways, either forward and backward easily as compared to Single Linked List.
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