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Programs/LinkedList-Basiclinkedlistoperationslikeinsertion,deletion.java

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+// Node class for the linked list
+class Node {
+    int data;
+    Node next;
+
+    Node(int data) {
+        this.data = data;
+        this.next = null;
+    }
+}
+
+// LinkedList class
+class LinkedList {
+    Node head;
+
+    // Insert at the end
+    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;
+        }
+    }
+
+    // Delete by value
+    public void delete(int value) {
+        if (head == null) {
+            System.out.println("List is empty.");
+            return;
+        }
+
+        // If the node to be deleted is the head node
+        if (head.data == value) {
+            head = head.next;
+            return;
+        }
+
+        Node current = head;
+        while (current.next != null && current.next.data != value) {
+            current = current.next;
+        }
+
+        // If the value is not found
+        if (current.next == null) {
+            System.out.println("Value not found.");
+            return;
+        }
+
+        // Delete the node
+        current.next = current.next.next;
+    }
+
+    // Display the linked list
+    public void display() {
+        Node current = head;
+        while (current != null) {
+            System.out.print(current.data + " -> ");
+            current = current.next;
+        }
+        System.out.println("null");
+    }
+}
+
+// Main class to test LinkedList operations
+public class Main {
+    public static void main(String[] args) {
+        LinkedList list = new LinkedList();
+
+        // Insert elements
+        list.insert(10);
+        list.insert(20);
+        list.insert(30);
+        list.insert(40);
+
+        // Display list
+        System.out.println("Linked List:");
+        list.display();
+
+        // Delete element
+        list.delete(20);
+        System.out.println("After deleting 20:");
+        list.display();
+
+        // Try deleting non-existent element
+        list.delete(100);
+    }
+}