import java.util.Scanner;

public class SimpleBooleans {

    public static void main(String[] args) {

        System.out.println("10 > 5: " + (10 > 5));
        System.out.println("10 < 5: " + (10 < 5));
        System.out.println("10 == 10: " + (10 == 10));
        System.out.println("10 >= 10: " + (10 >= 10));
        System.out.println("10 <= 10: " + (10 <= 10));

        Scanner in = new Scanner(System.in);
        System.out.print("Please enter a radius: ");
        double radius = in.nextDouble();
        boolean valid = radius > 0;
        System.out.println("The radius entered is valid: " + valid);
        in.close();
    }

}