Activity 2.6 Number Guessing Game

Introduction

Adding simple selection and iteration to our code allows us to build a variety of fun programs. For this activity, we'll apply these concepts to create a classic number guessing game.

Objectives

Implementing game logic if statements and loops

Activity Tasks

Create a new project named 2-6-Number-Game.
Complete each task individually.

Task 1: Initalize Game Data

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import java.util.Scanner;
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public class Program {
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    public static void main(String[] args) {
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        Scanner input = new Scanner(System.in);
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        int secretNumber = (int)(Math.random() * 10) + 1;
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        int guess = 0;
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        int tries = 0;
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    }
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}

Task 2: Implement Core Game Logic

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import java.util.Scanner;
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public class Program {
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    public static void main(String[] args) {
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        Scanner input = new Scanner(System.in);
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        int secretNumber = (int)(Math.random() * 10) + 1;
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        int guess = 0;
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        int tries = 0;
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        while (guess != secretNumber) {
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            System.out.print("Guess the number (1-10): ");
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            guess = input.nextInt();
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            tries++;
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            if (guess == secretNumber) {
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                System.out.println("Correct! It took you " + tries + " tries!");
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            }
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            else if (guess > secretNumber) {
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                System.out.println("Wrong! Your guess was too high.");
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            }
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            else {
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                System.out.println("Wrong! Your guess was too low.");
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            }
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        }
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    }
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}
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//

Task 3: Add Data Validation

Notify the user if they either enter a number that's out of range or an invalid input.

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import java.util.Scanner;
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public class Program {
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    public static void main(String[] args) {
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        Scanner input = new Scanner(System.in);
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        int secretNumber = (int)(Math.random() * 10) + 1;
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        int guess = 0;
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        int tries = 0;
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        while (guess != secretNumber) {
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            System.out.print("Guess the number (1-10): ");
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            guess = input.nextInt();
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            tries++;
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            if (guess == secretNumber) {
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                System.out.println("Correct! It took you " + tries + " tries!");
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            }
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            else if (guess < 1 || guess > 10) {
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                System.out.println("Your guess was out of range.");
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            }
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            else if (guess > secretNumber) {
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                System.out.println("Wrong! Your guess was too high.");
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            }
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            else {
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                System.out.println("Wrong! Your guess was too low.");
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            }
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        }
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    }
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}
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//

Task 4: Bonus - Set Difficulty

Before the core game logic begins, ask the user to choose a difficulty: easy, medium, or hard.
Based on the difficulty chosen, set an appropriate number range that the user needs to guess.

Sample Output

Your program output should something similar to the sample output below.

Guess the number (1-10): 6
Wrong! Your guess was too high.
Guess the number (1-10): 3
Wrong! Your guess was too low.
Guess the number (1-10): 5
Wrong! Your guess was too high.
Guess the number (1-10): 4
Correct! It took you 4 tries!

Reflection Questions

You may write your reflection answers as comments at the bottom of your code.

How was the while loop essential for making the game playable more than once.
Where did you use if/else if/else statements to guide the player?

Submission

Submit your activity and reflection answers to the appropriate dropbox.