Area of Regular Polygon Using method

 import java.util.*;

public class AreaOfRegularPolygon{

public static void main(String args[]){

Scanner sc = new Scanner(System.in);

System.out.println("Enter the no. of sides of the Polygon");

int n = sc.nextInt();

System.out.println("Enter the length of side of the Polygon");

double s = sc.nextDouble();

System.out.println("Area of Polygon with "+n+" "+"sides is : "+calculateArea(n, s));

}

public static double calculateArea(int n, double s){

return (n * s * s) / (4 * Math.tan(Math.PI/n));

}

}