For) X´s & Y´s

public class Main {

    public static void main(String[] args) {
        System.out.println(" x      y    ");
        System.out.println("-----------");
        double x = -10;


        for (x = x ; x <= 10 ; x = x + 0.5){
            double y = x*x;
            System.out.println(x + " \t " + y);
        }
    }
}