using System;

​

public class Program

{

    public static void Main()

    {

        int[] array = new int[100];

        int search = 0;

        Console.WriteLine("Enter number of elements in array\n");

        int n = 0;

        if (int.TryParse(Console.ReadLine(), out n))

        {

            Console.WriteLine(string.Format("Enter {0} integer(s)\n", n));

        }

        else

        {

            Console.WriteLine("Invalid number entered. Please enter number in format: #");

        }

​

        for (int c = 0; c < n; c++)

        {

            int z = 0;

            if (int.TryParse(Console.ReadLine(), out z))

            {

                array[c] = z;

            }

            else

            {

                Console.WriteLine("Invalid number entered. Please enter number in format: #");

            }

        }

​

        Console.WriteLine("Enter a number to search\n");

        int num = 0;

        if (int.TryParse(Console.ReadLine(), out num))

        {

            int index = 0;

            for (int c = 0; c <= n; c++)

            {

                if (array[c] == num) /* If required element is found */

                {

                    index = c;

                    Console.WriteLine(string.Format("{0} is present at location {1}.\n", num, c + 1));

                    break;

                }

            }

​

            if (index == n)

                Console.WriteLine(string.Format("{0} isn't present in the array.\n", num));

        }

        else

        {

            Console.WriteLine("Invalid number entered. Please enter number in format: #");

        }

    }

}