חישוב שטח והיקף של ריבוע

import java.util.Scanner;

class Main {
    public static void main(String[] args) {
        Scanner myScanner = new Scanner(System.in);

        System.out.print("Enter square side length: ");
        double x = myScanner.nextDouble();
        myScanner.close();

        double s = x * x; // s = Math.pow(x,2);
        double p = 4 * x;

        System.out.println("Square side length is: " + x);
        System.out.println("Square area is: " + s);
        System.out.println("Square perimeter is: " + p);
    }
}