Linked List Data Structure

A linear data structure where elements are stored in nodes. Each node has a data part containing the element's value and a next part referencing the following node.

The first node in a linked list. Serves as the starting point for traversing the list.

The last node in a linked list. It does not point to a subsequent node, denoted as NULL.

A type of linked list where traversal is only possible in the forward direction. Each node references the next node, but not the previous one.

A type of linked list allowing traversal in both forward and backward directions. Each node references both the next and previous nodes.

A type of linked list where the last element points back to the first element, forming a closed loop.

A type of circular linked list where each node references the next and previous nodes, forming a closed loop.

Inserting a new node into a linked list at a specific position involves checking if the position is valid. If the position is null (doesn't exist), do nothing. Otherwise, connect the new node's 'next' pointer to the 'next' pointer of the previous node and update the previous node's 'next' pointer to the new node.

Searching for an element in a linked list requires a temporary node pointing to the head. You also need variables to track the current node's index and search status. Start by checking if the temp node is not null. Traverse the list and compare the current node's value with the search value. If it matches, update the search variable and stop traversing. If the temp node is empty at the start, the list is empty.

Deleting the first node requires checking if the head is not null. If it's not, create a temporary node pointing to the head, move the head pointer to the next node, and delete the temp node.

To delete the last node in a linked list, first verify that the head is not empty. If it's not, check if the head's next is empty. If it is, release the head. Otherwise, traverse to the second last node. Connect the next of the second last node to NULL and delete the last node.

Deleting a node at a specific position requires checking if the position is valid (greater than or equal to 1). If the position is 1 and the head is not null, make the head's next as the head and delete the old head. Otherwise, traverse to the node before the specified position. If both the specified node and the node before it are not null, adjust the links. Otherwise, the specified node doesn't exist.

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

Iterating through each node in a linked list, typically to display or process the data contained within each node. It involves starting at the head node, accessing the data, moving to the next node using the next pointer, and repeating until the end of the list is reached.

Adding a new node to the end of a linked list by linking the last node to the new node. It involves creating the new node, traversing to the last node, setting its next pointer to the new node, and updating the next pointer of last node to point to the new node.

Adding a new node at a specified position within a linked list. It involves creating the new node, traversing to the node before the target position, updating the next pointer of the previous node to point to the new node, and setting the next pointer of the new node to point to the node at the target position.

Removing the first node from a linked list. It involves updating the head pointer to point to the second node in the list. If the list only has one node, update the head to null.

Removing the last node (tail) from a linked list. It involves identifying the node before the last node and setting its next pointer to null, effectively disconnecting the last node.

Removing a node at a specified position from a linked list. It involves traversing to the node before the target position, linking the previous node's next pointer to the target node's next pointer, effectively removing the target node from the list.

Removing all nodes from a linked list, making it empty. It involves iterating through the list, deleting each node by setting its next pointer to null, and updating the head pointer to null.

Counting the number of nodes in a linked list. It involves traversing through the list and incrementing a counter for each visited node.

Reversing the order of nodes in a linked list. It involves iterating through the list, changing the next pointers of each node to point to the previous node, and updating the head pointer to the last node. It's done iteratively by keeping track of three pointers: prev, curr, and next.