import java.util.Scanner;
import java.util.Random;
public class Main {

    public static void main(String[] args) {
        Scanner keyboard = new Scanner(System.in);
        Random rng = new Random();

        String again;
// if we remove the value of the string after the code is made into a 'do-while' loop, the code still runs as the 'do' part will always run regardless of any variables that are affected afterwards.
        do
        {
            int flip = 1+rng.nextInt(2);
            String coin="";

            if ( flip == 1 )
                coin = "HEADS";
            else
                coin = "TAILS";

            System.out.println( "You flip a coin and it is... " + coin );

            System.out.print( "Would you like to flip again (y/n)? " );
            again = keyboard.next();
        }while(again.equals("y"));
    }
}