using System;

public class Program

{

    public static void Main()

    {

        int highest=0; int lowest=0; 

        int value =0;

        int avg = 0;

        int loop = 0;

while(value >= 0) 

{ 

    Console.WriteLine("Enter a positive integer or a negative value to quit: ");

         value = int.Parse(Console.ReadLine());

    if(value >= 0){

        loop++;

        avg+=value;

        if (value > highest)

        {

            highest = value;

        } 

             if(loop==1)

             {

                lowest = value;

             }

            else if( value<lowest ){

                lowest = value;

            }

                }

 }

        if(loop!=0){

                    avg = avg/loop;

​

 Console.WriteLine("Highest: " + highest + ", Lowest: " + lowest); 

        Console.WriteLine("Avg: "+ avg);}

        else{

                    Console.WriteLine("No numbers were entered");}

​

    }

}