//
//   CS-201
//
//   Lab 3
//
//   Tracing Loops
//
//   For each loop manually determine the output displayed
//   then check your results by compiling and running
//

public class Loops
{
   public static void main (String[] args)
   {
      int x, y;
      char c1, c2;

      System.out.println( "\n*** Loop 1 ***\n");
      x = 2;

      while (x < 10)
      {
          System.out.println( "\nx = " + x);
          x = x + x;
      }

      System.out.println( "\nLoop 1 FINAL VALUE: x = " + x);

      System.out.println( "\n\n*** Loop 2 ***\n");
      x = 2;
      y = 20;

      while (x < y)
      {
          System.out.println( "\nx = " + x + " y = " + y);
          x = x + 2;
          y = y - 3;
      }

      System.out.println( "\nLoop 2 FINAL VALUES: x = " + x + " y = " + y);

      System.out.println( "\n\n*** Loop 3 ***\n");
      x = 2;
      y = 40;

      while (x + 2 < y - 5)
      {
          System.out.println( "\nx = " + x + " y = " + y);
          x = x + 2;
          y = y - 3;
      }

      System.out.println( "\nLoop 3 FINAL VALUES: x = " + x + " y = " + y);

      System.out.println( "\n\n*** Loop 4 ***\n");
      x = 2;
      y = 40;

      while (x * 2 < y)
      {
          x = x + 4;
          y = y - 4;
      }

      System.out.println( "\nLoop 4 FINAL VALUES: x = " + x + " y = " + y);

      System.out.println( "\n\n*** Loop 5 ***\n");
      c1 = 'a';
      c2 = 'm';

      while (c1 <= c2)
      {
          System.out.println( "\nc1 = " + c1 + " c2 = " + c2);
          c1 = (char)((int)c1 + 1);
          c2 = (char)((int)c2 - 1);
      }

      System.out.println( "\nLoop 5 FINAL VALUES: c1 = " + c1 + " c2 = " + c2);
      System.out.println("\nEND OF PROGRAM\n\n");
   }

 }