A guessing game with nested do...while loop - Java Language Basics

Java examples for Language Basics:do while

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Description

A guessing game with nested do...while loop

Demo Code

import java.util.Scanner;

public class GuessingGame{
  static Scanner sc = new Scanner(System.in);
    public static void main(String[] args) {
    boolean keepPlaying = true;

    while (keepPlaying)
    {//from   w  ww  . java 2s .  co m
      boolean validInput;
      int number, guess;
      String answer;

      number = (int)(Math.random() * 10) + 1;

      System.out.println("A number between 1 and 10.");
      System.out.print("Guess:");
      do
      {
        guess = sc.nextInt();
        validInput = true;
        if ( (guess < 1) || (guess > 10) )
        {
            System.out.print("between 1 and 10. Try again: ");
            validInput = false;
        }
      } while (!validInput);

      if (guess == number)
        System.out.println("right!");
      else
        System.out.println("Wrong: The number was " + number);

      do{
        System.out.print("\nPlay again? (Y or N)");
        answer = sc.next();
        validInput = true;
        if (answer.equalsIgnoreCase("Y"))
          ;
        else if (answer.equalsIgnoreCase("N"))
            keepPlaying = false;
        else
            validInput = false;
      } while (!validInput);
    }
    }
}

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