Write a program with a loop that lets the user enter a series of positive integers. The user should enter −1 to signal the end of the series. The program should count all the numbers entered, compute the running total of the numbers and displays their count, total and average. Display average to decimal places.

import java.util.Scanner;

public class num2 {

   public static void main(String[] args) {

       Scanner in = new Scanner(System.in);

       int count =0;

       int total = 0;

       System.out.println("Enter the numbers");

       int num = in.nextInt();

       while(num!=-1){

           total = total+num;

           count++;

           System.out.println("Enter the next number");

           num = in.nextInt();

       }

//Compute the average

       double average = (double) total/count;

//Outputs

       System.out.println("Total count of numbers entered "+(count));

       System.out.println("Sum of the numbers "+total);

       System.out.printf("Average is %.2f ",average);

   }

}

Explanation:

only #2 represents an object at rest on a table.

in #1, there is no normal force due to the table; the object is accelerating downward.

in #3, the vertical forces are not balanced; the object is accelerating downward.

in #4, neither the vertical nor the horizontal forces are balanced. the object is accelerating upwards and to the right.