Operations on Linked Lists

Linked lists support various operations, including insertion, deletion, and traversal. Let's take a look at each of these operations in detail.

Insertion

Insertion refers to adding an element to a linked list. There are several scenarios to consider when inserting an element:

• Insertion at the beginning: In this case, a new node is created and its next pointer is set to the current head of the linked list. The new node then becomes the new head.

• Insertion at the end: When inserting at the end, a new node is created and its next pointer is set to None. The next pointer of the last node in the linked list is then updated to point to the new node.

• Insertion at a specific position: To insert an element at a specific position, we first need to traverse the linked list to find the position where we want to insert the new node. We then update the next pointers of the nodes before and after the position to include the new node.

Here's the Python code for the insertion operation:

{{code}}

Deletion

Deletion involves removing an element from the linked list. Similar to insertion, there are several scenarios to consider:

• Deletion of the head node: In this case, we simply update the head pointer to point to the next node in the list

• Deletion of a node: To delete a non-head node, we need to find the node and update the next pointer of the previous node to skip the node to be deleted.

Here's the Python code for the deletion operation:

{{code}}

Traversal

Traversal involves visiting each element in the linked list and performing some operation on it. In this case, we simply print the data of each node in the linked list.

Here's the Python code for the traversal operation:

{{code}}

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llist.traverse()

# Python code for Linked List operations

​

# Node class

class Node:

    def __init__(self, data=None):

        self.data = data

        self.next = None

​

# LinkedList class

class LinkedList:

    def __init__(self):

        self.head = None

​

    # Insertion operation

    def insert(self, data):

        new_node = Node(data)

        if self.head is None:

            self.head = new_node

        else:

            temp = self.head

            while temp.next:

                temp = temp.next

​

    # Deletion operation

    def delete(self, data):

        if self.head is None:

            return None

        temp = self.head

        if temp.data == data: