import cs1.Keyboard;
/**
   Calculate the sum of integers from i to j.
   @author Greg Vogl
   last modified 2003-09-22
*/
public class Sumij
{
   /**
      Calculate the sum of integers from i to j.
   */
   public static void main (String[] args) 
   {
      // get input
      System.out.println("This program calculates the sum of integers from i to j.");
      System.out.println("Enter the first integer i and press Enter.");
      int i = Keyboard.readInt();
      System.out.println("Enter the second integer j and press Enter.");
      int j = Keyboard.readInt();

      // calculate statistics
      int sum = 0;
      for (int k = i; k <= j; k++)
         sum += k;

      // output results
      System.out.println("The sum of all integers from " + i + " through " + j + " is " + sum);
   }
}