Linked List Overview and Structure

A linear data structure where elements are organized in a sequence of nodes. Each node contains data and a pointer referencing the next node.

The starting node of a linked list. It serves as the reference point for traversing the list.

The last node in a linked list. It points to NULL, signifying the end of the list.

A linked list that allows traversal only in one direction (forward).

A linked list that allows traversal in both forward and backward directions.

A singly linked list where the last node points back to the first node, creating a circular structure.

A doubly linked list where the last node points to the first node, and the first node points to the last node, creating a circular structure.

Inserting a new node at a specific position in a linked list involves two steps: 1) If the position is the first node, update the head pointer directly. 2) Otherwise, traverse to the node before the specified position and adjust the links to insert the new node.

Searching for a specific element within a linked list involves iterating through each node and comparing the current node's data with the target value. If the target value is found, stop traversing the list; otherwise, continue until you reach the end of the list.

Removing the first node from a linked list is simple. If the list is not empty (head is not null), create a temporary pointer to store the head, update the head to the next node, and then delete the temporary node.

To delete the last node in a linked list, 1) Ensure the list is not empty. 2) If the list has only one node (head.next is null), delete the head. 3) Otherwise, traverse to the second last node (the one before the end), set its next pointer to NULL, and delete the last node.

Deleting a specific node in a linked list (at a given position) involves a few steps: 1) if the position is 1, delete the head. 2) Otherwise, traverse to the node before the specified position and update its next pointer to skip the target node. Finally, delete the target node.

Adding a new node to the beginning of the linked list. It involves creating a new node, setting its 'next' pointer to the current head, and then updating the head pointer to point to the new node.

Traversing a linked list involves visiting each node sequentially, starting from the head. This requires iterating through the list, displaying the data held by each node, and moving to the next node.

Adding a new node to the end of the linked list. It involves creating a new node, finding the current last node, setting the last node's 'next' pointer to the new node, and finally updating the tail pointer to point to the new node.

Adding a new node at a specific position within the linked list. It involves creating a new node, finding the node before the desired position, setting the new node's 'next' pointer to the node at the desired position, and then updating the previous node's 'next' pointer to point to the new node.

Deleting the first node in a linked list. This involves updating the head pointer to point the next node and deleting the original head node.

Deleting the last node in a linked list. This involves finding the second-to-last node, setting its 'next' pointer to null, and deleting the original last node.

Deleting a node at a specific position in the linked list. This involves finding the node before the desired position, setting its 'next' pointer to the node after the desired position, and deleting the node at the specified position.

Deleting all nodes in a linked list. This involves traversing the entire list, deleting each node one by one, and updating the head pointer to null when all nodes are deleted.

Counting the total number of nodes in a linked list. This involves traversing the list, incrementing a counter for each visited node, and returning the final count after iterating through all nodes.

Reversing the order of nodes in a linked list. This involves iterating through the list, updating 'next' pointers of each node to point to the previous node, and finally updating the head pointer to the last node in the original list.