High-Low Guessing Game

import java.text.NumberFormat;
import java.util.Random;
import java.util.Scanner;

public class HiLo {
	public static void main(String[] args) {
		String repeat = "y";
		
		//loop for playing the game
		while (repeat.equals("y") || repeat.equals("Y") || repeat.equals("Yes") || repeat.equals("yes")) {
			
			//Random Number 0-100
			Random r = new Random();
			int target = r.nextInt(101);
			
			//Number of guesses
			int n = 1;
			
			//User inputs a guess
			int guess;
			Scanner scan = new Scanner(System.in);
			System.out.print("Enter a guess: ");
			guess = scan.nextInt();
			
			//Loop for guessing
			while (guess != target) {
				
				//when the guess is out of range
				if (guess > 100 || guess < 0) {
					System.out.println("That guess is out of range!");
					System.out.print("Enter a guess: ");
					guess = scan.nextInt();
				}
				//Guess is too big
				else if (guess > target) {
					n++;
					System.out.print("Too high. Enter a guess: ");
					guess = scan.nextInt();
				}
				//Guess is too small
				else if (guess < target) {
					n++;
					System.out.print("Too low. Enter a guess: ");
					guess = scan.nextInt();
				}
			}
			
			// Prints Congratulations as well as the number of guesses guessed
			System.out.println("Congratulations! It took you " + n + " guesses!");
			
			// Calculates & prints the score
			NumberFormat f = NumberFormat.getPercentInstance();
			f.setMinimumFractionDigits(0);
			double score = 1.0/n;
			System.out.println("You scored: " + f.format(score) + ".");
			
			// Asks the user if the want to play again
			System.out.print("Play again? ");
			// reads user's input on whether they want to play again 
			repeat = scan.next();
			
		} //The while loop ends here
		
		// A yes, Yes, y, or Y will allow the user to play again, anything else ends the game
		System.out.println("Good-bye."); 
		
		
	}
	
}