Can anyone help me with this program using the Scanner Class?

Question

I have to write a program that asks for the speed of a vehicle (in miles-per-hour) and the number of hours it has traveled. It should use a loop to display the distance a vehicle has traveled for each hour of a time period specified by the user. Such as 1 hour will equal 40 miles traveled, 2 hours will equal 80, 3 hours will equal 120, etc. This is what I've come up with thus far. Any help is appreciated.
import java.util.Scanner;
     public class DistanceTraveled
          public static void main(String[] args)
               int speed;
               int hours;
               int distance;
               Scanner keyboard = new Scanner(System.in);
               System.out.print("What is the speed of the vehicle in miles-per-hour?");
               speed = keyboard.nextInt();
               System.out.print("How many hours has the vehicle traveled for?");
               hours = keyboard.nextInt();
               distance = speed*hours;
               while (speed < 0)
               while (hours < 1)
               System.out.println("Hour     Distance Traveled");
               System.out.println("------------------------");
               System.out.println(hours + " " + distance);
}

Answer 1

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You seem to be trying to reuse the speed and hours variables in your loop. That's probably a mistake at this point. Keep it simpler by defining a loop variable.
Also I don't see the need for two loops. You just want to show how far the vehicle has traveled for each one-hour increment, assuming constant speed, for the number of hours it has been traveling, right? So a single for loop should be sufficient.