Introduction

This program is a fun and interactive game where the computer selects a random number, and the user attempts to guess it.
It’s an excellent way to learn Go programming, practice using libraries, and understand conditional statements.

Objective

The objective of this project is to develop a simple yet engaging number guessing game to improve problem-solving skills
and familiarity with Go programming concepts such as random number generation, loops, and user input handling.

Code

package main

import (
	"bufio"
	"fmt"
	"math/rand"
	"os"
	"strconv"
	"time"
)

func main() {
	// Initialize the random seed
	rand.Seed(time.Now().UnixNano())

	// Generate a random number between 1 and 100
	target := rand.Intn(100) + 1
	fmt.Println("Welcome to the Number Guessing Game!")
	fmt.Println("I have selected a number between 1 and 100. Can you guess it?")

	// Scanner for user input
	reader := bufio.NewReader(os.Stdin)

	for attempts := 1; ; attempts++ {
		fmt.Printf("Attempt %d: Enter your guess: ", attempts)
		input, err := reader.ReadString('\n')
		if err != nil {
			fmt.Println("Error reading input. Please try again.")
			continue
		}

		// Convert input to integer
		guess, err := strconv.Atoi(input[:len(input)-1])
		if err != nil {
			fmt.Println("Invalid input. Please enter a number.")
			continue
		}

		// Check the user's guess
		if guess < target { fmt.Println("Too low!") } else if guess > target {
			fmt.Println("Too high!")
		} else {
			fmt.Printf("Congratulations! You've guessed the number in %d attempts.\n", attempts)
			break
		}
	}
}

Explanation

The program is structured as follows:

• Random Number Generation: The math/rand package is used to generate a random number
  between 1 and 100.
• User Input: The bufio and os packages are used to read input from the user,
  which is then converted to an integer using the strconv package.
• Game Loop: A loop is used to repeatedly prompt the user for guesses until the correct number is guessed.
• Conditional Statements: If-else conditions compare the user’s guess with the target number and provide
  feedback (“Too low”, “Too high”, or “Correct”).

How to Run the Program

1. Ensure you have Go installed on your system. You can download it from
   Go’s official website.
2. Save the code in a file named guessing_game.go.
3. Open a terminal and navigate to the directory containing the file.
4. Run the program with the following command:

   go run guessing_game.go

5. Follow the on-screen instructions to play the game.