advantages of double linked list over a single linked list

Bidirectional Navigation: A double linked list can be traversed in both directions i.e. from the start to the end (forward direction) and from the end to the start (backward direction). This is not possible in a single linked list.

Insertion and Deletion: In a double linked list, insertion and deletion of nodes can be performed more efficiently if the pointers to the node are given. In a single linked list, to delete a node, pointer to the previous node is needed. To get this information, sometimes the list is traversed from the start, which makes the deleting operation more complex.

Efficient Memory Utilization: In a double linked list, we can traverse from both the sides i.e. from the start to the end and from the end to the start. Hence, if we need to access an element that is closer to the end of the list, we can start traversing from the end and reach the element faster. This is not possible in a single linked list.

Reverse Traversing: In a double linked list, reverse traversing is possible, which is not in the case of a single linked list. This is useful in some scenarios where we need to go through the list elements in a reverse order.

Dynamic Data Structure: Double linked list is a dynamic data structure. It can grow and be pruned at runtime by allocating and deallocating memory. Therefore, it provides a flexible size, which is not fixed and can adjust according to the size of the list.

Use of DLL: Double linked list can be used in navigation based systems where forward and backward navigation is required because it can be traversed in both the directions.