From Given a singly linked list, write a program to find the middle element of Linked List.

For example

Input: 
1->2->3
 
Output: 
2

Solution:

using System;

namespace LinkedListOpearation
{
    public class Program
    {


        public static void Main()
        {
            //creating LinkedList with 5 elements including head
            LinkedList linkedList = new LinkedList();
            Node head = linkedList.Head; 
            linkedList.Add(new Node("1"));
            linkedList.Add(new Node("2"));
            linkedList.Add(new Node("3"));
            linkedList.Add(new Node("4"));

            //finding middle element of LinkedList in single pass
            Node current = head;
            int length = 0;
            Node middle = head;

            while (current.Next != null)
            {
                length++;
                if (length % 2 == 0)
                {
                    middle = middle.Next;
                }
                current = current.Next;
            }

            if (length % 2 == 1)
            {
                middle = middle.Next;
            }

            Console.WriteLine($"LinkedList length:{length} ");
            Console.WriteLine($"LinkedList middle element:{middle.Data}");
            Console.ReadLine();

        }

    }

    class LinkedList
    {
        public Node Tail { get; set; }
        public Node Head { get; set; }

        public LinkedList()
        {
            Head = new Node("head");
            Tail = Head;
        }

        public void Add(Node node)
        {
            Tail.Next = node;
            Tail = node;
        }
    }
    public class Node
    {
        public Node Next { get; set; }
        public string Data { get; set; }

        public Node(string data)
        {
            Data = data;
        }
    }
}