Boolean Numbers

// Demonstrate boolean values.
    class BoolDemo {
        public static void main(String args[]) {
            boolean b;
            b = false;
            System.out.println("b is " + b);
            b = true;
            System.out.println("b is " + b);
            // a boolean value can control the if statement
            if(b) System.out.println("This is executed.");
            b = false;
            if(b) System.out.println("This is not executed.");
            // outcome of a relational operator is a boolean value
            System.out.println("10 > 9 is " + (15 > 9));
    }
}