Area of Circle in Java

1import java.util.Scanner;
2
3public class Main {
4    public static void main(String[] args) {
5        Scanner sc = new Scanner(System.in);
6
7        System.out.print("Enter radius: ");
8        double r = sc.nextDouble();
9
10        double area = Math.PI * r * r;
11        System.out.println("Area of circle = " + area);
12
13        sc.close();
14    }
15}