SWITCH CASE 

switch (exp)

{

 case constant 1;

          statement;

         break;

  case constant 2;

           statement;

           break;

_____________

           ________

          ________

          default;

        statement;

}

RULES FOR SWITCH CASE :=

1.)  CASE CONSTANTS MUST BE OF TYPE INT OR CHAR.

2.) NO TWO CASE MAY BE SAME.

3.) BREAK IS OPTIMAL.

4.) DEFAULT IS OPTIMAL.

EXAMPLE

class color 

{

 public static void main (string args[])

 {

  char ch = args[0.].char At(0);

  switch(ch)

   {

     case "R":

     system.out.println("RED");

     break;

     case "G":

     system.out.println("GREEN");

     break;

     case "B":

     system.out.println("BLUE");

     break;

    default;

     system.out.println("UNDEFINED"); 

   } 

  }

 }

AS SAME WE CAN MAKE A CALCULATOR OR MORE OTHER PROGRAMS.