For and While loop choice.

 /*
     Difference between 'for' and 'while'.
     We can transform everything between 'for' and 'while'.
     if the incremnet is just use for increase,we recommended 'for';
     but if we want to preserved the increment and use it after the loop,'while' is recommented.
 */
 import kju.print.Print;
 class ForWhile
 {
     public static void main(String[] args)
     {
         /*
         'i' is created after 'for',so it was release after the close brace.
         */
         for(int i = 0; i < 3; i++) {
             Print.println("i = " + i);
         }
         /*
         i = 0
         i = 1
         i = 2
         */
         //Print.println("after the loop, i = " + i);    //compile error,i does not exist.

         Print.println("-----------");
         /*
         'j' is created before 'while',so it was preserved after the close brace.
         */
         int j = 0;
         while(j < 3){
             Print.println("j = " + j);
             j++;
         }
         /*
         j = 0
         j = 1
         j = 2
         */
         Print.println("after the loop, j = " + j);
         //after the loop, j = 3
     }
 }