<ul><li>Doubly Linked List is a special data structure, which is a collection of zero or more nodes.</li><li>Each node is made up of 3 parts, prev_link + data + next_link.</li><li>In a Doubly Linked List, we need to store the address information for the previous node and the next node.</li><li>The DLL operations include inserting an element at the rear, deleting an element with a given key value, searching for an element and displaying all the data.</li><li>The implementation of DLL includes defining structures for nodes, head pointer, and the 4 defined operations.</li><li>The C++ code presented inserts, deletes, searches and displays elements in a DLL.</li><li>When inserting elements at the rear, we check if head node is NULL.</li><li>If the head element is not NULL, we use the next pointer to move to the end of the list to add the element.</li><li>To delete an element we move the pointer temp to the element with that key, then update pointers for adjacent nodes before deleting the temp node.</li><li>To search an element we move the temp pointer to the head and check if the data is the same as key.</li></ul>

Data structure tutorial 4: Doubly Linked List [DLL]

Discover more