Area

//VARIABLE DESCRIPTION:
//pi=PI VALUE
//r=RADIUS OF CIRCLE
//s=SIDE OF SQAURE
//l=LENGTH OF RECTANGLE
//b=BREADTH OF RECTANGLE
//area=AREA OF EACH SHAPE
import java.io.*;
class AREA
{
    private static double area;
    public static void main(String args[])throws IOException
    {
        InputStreamReader reader=new InputStreamReader(System.in);
        BufferedReader input=new BufferedReader(reader);
        int choice;
        System.out.println("");
        System.out.println("$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$");
        System.out.println("");
        System.out.println("\t\t\t\t\t\t\t\t A PROGRAM TO CALCULATE AREA OF A CIRCLE , ASQUARE AND A RECTANGLE");
        System.out.println("");
        System.out.println("$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$");
        System.out.println("");
        System.out.println("=====================================================================================================================================================================================");
        System.out.println("\t\t\t\t\t\t\t\t\tENTER YOUR CHOICE :");
        System.out.println("\t\t\t\t\t\t\t\t\t1> AREA OF CIRCLE");
        System.out.println("\t\t\t\t\t\t\t\t\t2> AREA OF SQUARE");
        System.out.println("\t\t\t\t\t\t\t\t\t3> AREA OF RECTANGLE");
         System.out.println("=====================================================================================================================================================================================");
        System.out.print("USER INPUT :");
        choice=Integer.parseInt(input.readLine());
        final double pi=3.14;
        switch(choice)
        {
            case 1:
            {
                 System.out.println("=====================================================================================================================================================================================");
                System.out.println("ENTER THE RADIUS OF THE CIRLE");
                double r=Double.parseDouble(input.readLine());
                area=pi*r*r;
                System.out.println("AREA OF THE CIRCLE IS :"+area);
                 System.out.println("=====================================================================================================================================================================================");
                break;
            }
            case 2:
            {
                 System.out.println("=====================================================================================================================================================================================");
                 System.out.println("ENTER THE SIDE OF THE SQUARE");
                 double s=Double.parseDouble(input.readLine());
                 area=s*s;
                 System.out.println("AREA OF THE SQUARE IS :"+area);
                  System.out.println("=====================================================================================================================================================================================");
                 break;
            }
            case 3:
            {
                 System.out.println("=====================================================================================================================================================================================");
                 System.out.println("ENTER THE LENGTH OF THE RECTANGLE");
                 double l=Double.parseDouble(input.readLine());
                 System.out.println("ENTER THE BREADTH OF THE RECTANGLE");
                 double b=Double.parseDouble(input.readLine());
                 area=l*b;
                 System.out.println("AREA OF THE RECTANGLE IS :"+area);
                  System.out.println("=====================================================================================================================================================================================");
                 break;
            }
            default:
            {
                System.out.println("ENTERED WRONG INPUT THE PROGRAM WILL END");
                break;
            }
        }
    }
}

                
                    OUTPUT 1:



$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$



 A PROGRAM TO CALCULATE AREA OF A CIRCLE , ASQUARE AND A RECTANGLE



$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$



===================================================================

        ENTER YOUR CHOICE :

        1> AREA OF CIRCLE

        2> AREA OF SQUARE

        3> AREA OF RECTANGLE

===================================================================

USER INPUT :1
===================================================================

ENTER THE RADIUS OF THE CIRLE

5
AREA OF THE CIRCLE IS :78.5

===================================================================



$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$



 A PROGRAM TO CALCULATE AREA OF A CIRCLE , ASQUARE AND A RECTANGLE



$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$



===================================================================

        ENTER YOUR CHOICE :

        1> AREA OF CIRCLE

        2> AREA OF SQUARE

        3> AREA OF RECTANGLE

===================================================================

USER INPUT :2
===================================================================

ENTER THE SIDE OF THE SQUARE

5
AREA OF THE SQUARE IS :25.0

===================================================================



$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$



A PROGRAM TO CALCULATE AREA OF A CIRCLE , ASQUARE AND A RECTANGLE



$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$



===================================================================

        ENTER YOUR CHOICE :

        1> AREA OF CIRCLE

        2> AREA OF SQUARE

        3> AREA OF RECTANGLE

===================================================================

USER INPUT :3
===================================================================

ENTER THE LENGTH OF THE RECTANGLE

5
ENTER THE BREADTH OF THE RECTANGLE

6
AREA OF THE RECTANGLE IS :30.0

===================================================================



$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$



A PROGRAM TO CALCULATE AREA OF A CIRCLE , ASQUARE AND A RECTANGLE



$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$



===================================================================

        ENTER YOUR CHOICE :

        1> AREA OF CIRCLE

        2> AREA OF SQUARE

        3> AREA OF RECTANGLE

===================================================================

USER INPUT :7
ENTERED WRONG INPUT THE PROGRAM WILL END