Java program to print Area of circle

import java.io.*;
import java.util.*;
class Areaofcircle
{
public static void main (String[ ]args)
{
double pi;
double area,r;
Scanner sc= new Scanner(System.in);
System.out.println("Enter pi value");
pi=sc.nextDouble();
System.out.println ("Enter r value");
r=sc.nextDouble();
area=pi*r*r;
System.out.println ("area of circle is:"+" "+area);
}
}