Number Guessing Game in Java

Last Updated : 09 Jun, 2025

A number-guessing game in Java is a simple program where the computer randomly selects a number, and the user has to guess it within a limited number of attempts. The program provides feedback on whether the guessed number is too high or too low, guiding the user toward the correct answer.

This project is an excellent way for beginners to practice loops, conditionals, user input handling, and random number generation in Java.

Rules of the Game:

If the guessed number is bigger than the actual number, the program will respond with the message that the guessed number is higher than the actual number.
If the guessed number is smaller than the actual number, the program will respond with the message that the guessed number is lower than the actual number.
If the guessed number is equal to the actual number or if the K trials are exhausted, the program will end with a suitable message.

Implementation Details

The program generates a random number between a predefined range (e.g., 1 to 100).
The user has limited attempts (K tries) to guess the number.
At each guess, the program provides a hint:
- If the guessed number is higher, it tells the user to guess lower.
- If the guessed number is lower, it tells the user to guess higher.
If the user guesses correctly, they win.
If all attempts are exhausted, the game reveals the correct number.

Approach:

To implement the game, we need to follow the steps listed below:

Generate a random number using the Math.random() method.
Take user input using Scanner.
Compare the guess with the random number and provide feedback.
Limit the number of attempts using a loop.
Handle edge cases (e.g., invalid inputs).

Implementation:

The below Java program demonstrates the number-guessing game:

Java

// Java Program to demonstrates the Number guessing game import java.util.Scanner;  public class Geeks {          public static void guessingNumberGame()     {         Scanner sc = new Scanner(System.in);          // Generate a random number between 1 and 100         int number = 1 + (int)(100 * Math.random());                  // Number of attempts         int K = 5;          System.out.println(             "A number is chosen between 1 and 100.");         System.out.println(             "You have " + K             + " attempts to guess the correct number.");          // Loop for K attempts         for (int i = 0; i < K; i++) {             System.out.print("Enter your guess: ");             int guess = sc.nextInt();              // Check conditions             if (guess == number) {                 System.out.println(                     " Congratulations! You guessed the correct number.");                 sc.close();                                  // Exit function if guessed correctly                 return;             }             else if (guess < number) {                 System.out.println(                     " The number is greater than " + guess);             }             else {                 System.out.println(                     " The number is less than " + guess);             }         }          // If the user runs out of attempts         System.out.println(             "You've exhausted all attempts. The correct number was: "             + number);         sc.close();     }      public static void main(String[] args)     {         guessingNumberGame();     } }

Output:

Note: You can also use Random class from java.util instead of Math.random() to generate random numbers in Java.

Random random = new Random();
int number = random.nextInt(100) + 1;

Number Guessing Game with Unlimited Rounds and Score Tracking

Approach:

After Exhausting K attempts, the user is given another chance to continue the game.
The game tracks the score (number of attempts taken to guess correctly).
The game continues until the user guesses the correct number.

Implementation:

The below Java program demonstrates the number-guessing game with Unlimited Rounds and Score Tracking.

Java

// Number guessing game with // Unlimited Rounds and Score Tracking import java.util.Scanner;  public class Geeks {     public static void guessingNumberGame()     {         Scanner sc = new Scanner(System.in);          // Generate a random number between 1 and 100         int number = 1 + (int)(100 * Math.random());                  // Track the number of attempts         int attempts = 0;                   // Maximum attempts per round         int K = 5;          boolean guessedCorrectly = false;          System.out.println(             "A number is chosen between 1 and 100.");         System.out.println(             "You have " + K             + " attempts per round to guess the correct number.");          while (!guessedCorrectly) {                          // Give the user K attempts per round             for (int i = 0; i < K; i++) {                 System.out.print("Enter your guess: ");                 int guess = sc.nextInt();                 attempts++; // Increment attempt count                  if (guess == number) {                     System.out.println(                         "Congratulations! You guessed the correct number in "                         + attempts + " attempts.");                     guessedCorrectly = true;                     break;                 }                 else if (guess < number) {                     System.out.println(                         "The number is greater than "                         + guess);                 }                 else {                     System.out.println(                         "The number is less than " + guess);                 }             }              if (!guessedCorrectly) {                                  // Ask the user if they want to continue                 // after exhausting K attempts                 System.out.println("You have used all " + K                                    + " attempts.");                 System.out.print(                     "Do you want to continue guessing? (yes/no): ");                 String response = sc.next();                  if (!response.equalsIgnoreCase("yes")) {                     System.out.println(                         "Game Over! The correct number was: "                         + number);                     break;                 }             }         }          sc.close();     }      public static void main(String[] args)     {         guessingNumberGame();     } }