// From given string find longest word

​

​

using System;

public class Program

{

    public static void Main()

    {

        string input = "My Name is Safar Mansuri mansuri safarre"; // 32

        int start = 0;

        int end = 0;

        string longestWord = "";

​

        // While loop Goes upto length of the string

        while (end <= input.Length) 

        {

            // it Goes to length of the string and if find any space in beetween the string execute the logic

            if (end == input.Length || char.IsWhiteSpace(input[end]))

            {

                // First subString the input string To make it case insansitive foe better results

                string word = input.Substring(start, end - start);

                // every time the bigger the word the Length will assign to the longestword variable

                if (word.Length > longestWord.Length)

                {

                    longestWord = word;

                }

                // after The itration the the new word will be cheked

                start = end + 1;

            }

​

            end++;

        }// end of while

​

        Console.WriteLine("The longest word is: " + longestWord);

    }

    }

​