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basics using linked list

  Operation Using Linked List in Data Structure: Traversal, Insertion, Deletion and Searching  import java . util . Scanner ; // Node class represents each element in the linked list class Node {     int data ;     Node next ;     public Node ( int data ) {         this . data = data ;         this . next = null ;     } } // Custom LinkedList class to manage linked list operations class LinkedList {     private Node head ;     // Function to insert an element at the end of the linked list     public void insert ( int data ) {         Node newNode = new Node ( data );         if ( head == null ) {             head = newNode ;         } else {             Node current = head ;             while ( current . next != null ) {                 current = current . next ;             }             current . next = newNode ;         }     }     // Function to insert an element at a specific index in the linked list     public void insertAtIndex ( int data

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