Project Number Guessing Game

Context

The program picks a random number between 1 and 100. The user must guess it, with hints “too high” or “too low”. The game continues until the user guesses correctly.

This project combines:

• Random generation (math/rand)
• Loops (for)
• Conditionals (if/else)
• User input (fmt.Scan)

Step‑by‑step code

package main

import (
    "fmt"
    "math/rand"
    "time"
)

func main() {
    // Seed the generator (Go 1.20+ does this automatically, but kept for example)
    rand.NewSource(time.Now().UnixNano())
    secret := rand.Intn(100) + 1 // number between 1 and 100
    var guess int
    attempts := 0

    fmt.Println("Guess the number between 1 and 100!")

    for {
        fmt.Print("Your guess: ")
        _, err := fmt.Scan(&guess)
        if err != nil {
            fmt.Println("Invalid input.")
            continue
        }
        attempts++

        if guess < secret {
            fmt.Println("Too low!")
        } else if guess > secret {
            fmt.Println("Too high!")
        } else {
            fmt.Printf("Congratulations! You found %d in %d attempts.\n", secret, attempts)
            break
        }
    }
}

Example interaction

Guess the number between 1 and 100!
Your guess: 50
Too low!
Your guess: 75
Too high!
Your guess: 62
Too low!
Your guess: 68
Congratulations! You found 68 in 4 attempts.

Possible extensions

• Limit the number of attempts.
• Add option to play again.
• Handle non‑numeric input more robustly.

Useful links

• math/rand package documentation
• fmt package documentation
• Go by Example: Random Numbers