import java.util.Scanner;
public class Main {

    public static void main(String[] args) {

        Scanner keyboard = new Scanner(System.in);

        double from = -10;
        double fin = 10;
        double by = 0.5;


        System.out.println("\n X: ");
        System.out.println("-----");

        for (double n = from; n <= fin; n = n + by){

            System.out.println(n + "");
        }



    }
}