Area of Circle

 Area of Circle

Problem Description

Java Program to find area of circle

Note:

Use Double Data Type

and Use the following statements in the output

String.format("%.02f",area)

Logic Test Case 1

Input (stdin)

2

Expected Output

12.57

Logic Test Case 2

Input (stdin)

9

Expected Output

254.47

Code Area

import java.io.*;

import java.util.Scanner;

 public class TestClass {

public static void main(String[] args) 

     {

       int r;

       double pi=3.14159,area;

       Scanner in=new Scanner(System.in);

       r=in.nextInt();

       area=pi*r*r;

       String str1=String.format("%.02f",area);

       System.out.println(str1);

       }

}