Java Program to Guess a Random Number in a Range

Last Updated : 04 Dec, 2020

Write a program that generates a random number and asks the user to guess what the number is. If the user’s guess is higher than the random number, the program should display Too high, try again. If the user’s guess is lower than the random number, the program should display Too low, try again. The program should use a loop that repeats until the user correctly guesses the random number.

Input: 15 (a random value that is not known before)
Output: Guess a number between 1 and 100: 
1
Too low, try again
Guess a number between 1 and 100: 
10
Too low, try again
Guess a number between 1 and 100: 
25
Too high, try again
Guess a number between 1 and 100: 
20
Too high, try again
Guess a number between 1 and 100: 
15
Yes, you guessed the number.

Example

Java

// Java Program to guess a Random Number Generation

import java.util.Random;
import java.util.Scanner;

public class GFG {
    public static void main(String[] args)
    {

        // stores actual and guess number
        int answer, guess;

          // maximum value is 100
        final int MAX = 100;

        // takes input using scanner
        Scanner in = new Scanner(System.in);

        // Random instance
        Random rand = new Random();

        boolean correct = false;

        // correct answer
        answer = rand.nextInt(MAX) + 1;

        // loop until the guess is correct
        while (!correct) {

            System.out.println(
                "Guess a number between 1 and 100: ");

            // guess value
            guess = in.nextInt();

            // if guess is greater than actual
            if (guess > answer) {
                System.out.println("Too high, try again");
            }

            // if guess is less than actual
            else if (guess < answer) {
                System.out.println("Too low, try again");
            }

            // guess is equal to actual value
            else {

                System.out.println(
                    "Yes, you guessed the number.");

                correct = true;
            }
        }
        System.exit(0);
    }
}