using System;

public class Program

{

    public static void Main()

    {

        int[] a=new int[]{2, 4, 3, 4, 6, 7, 1 };

        int target=7;

        int i=0;

        while(i<=a.Length)

        {

            int A=a[i];

            int B=a[i+1];

            if(A+B==target)

            {

                Console.WriteLine("the pair of numbers{0}  {1}",A,B);

                i++;

            }

            else

        {

            Console.WriteLine(" the value is not equal to target");

        }

        Console.ReadLine();

        }

    }

}