Question

write a program in Java to calculate the area of circle.​

Answer 1

Answer:

Enter radius of circle:5

Area of circle:78.5

Explanation:

import java.util.Scanner;

public class Area

{

   public static void main(String[] args)  

   {

       int r;

       double pi = 3.14, area;

       Scanner s = new Scanner(System.in);

       System.out.print("Enter radius of circle:");

       r = s.nextInt();

       area = pi * r * r;

       System.out.println("Area of circle:"+area);

   }            

}

Answer 2

Answer:

public class AreaCircle

{

public void calcCircArea( )

{

double radius = 7.5 ;

double area = 3.14149 * radius * radius ;

System.out.print("Area or Circle :" + area) ;

}

}

Java:

Java is a popular third-generation programming language, which can be used to do any of the thousands of things that a computer software can do. With the features it offers, Java has become the language of choice for internet and intranet applications.