tutorial

//Using System; includes all the libraries that we will use

using System;

// Namespace organizes your code
namespace ProgrammingTutorial
{
    // In c# all code has to go inside a class
    class Program
    {
        //Random Class to generate random numbers
        static Random r = new Random();

        //Function that returns a random number that we can use
        public static int GetRandomNumber(int min, int max)
        {
            return r.Next(min, max + 1);
        }

        // Function to display text to the console
        public static void Say(string message)
        {
            Console.WriteLine(message);
        }

        // Input validation to get a number from the user
        public static int AskForNum(string optionalMessage = "")
        {
            while(true)
            {
                string s = Console.ReadLine();
                if(int.TryParse(s, out int x))
                {
                    return x;
                }
                if(!string.IsNullOrEmpty(optionalMessage))
                    Say(optionalMessage);
            }
        }

        //This is main starting point for your program
        public static void Main(string[] args)
        {
            while(true)
            {
                Say("Hello human! Would you like to play a game? Enter 1 to play!");
                int x = AskForNum("That wasn't a vaild response!");
                //if x is equal to 1 we play game, else we quit
                if(x == 1)
                {
                    //store a random number for the user to guess
                    int number = GetRandomNumber(1, 100);
                    while(true)
                    {
                        Say("Ok! I am guessing of a number between 1 and 100! Can you guess it!?");
                        //make the user input a guess
                        int guess = AskForNum("Guess a proper number!");
                        //then we compare the guess to the computer's number
                        if(guess == number)
                        {
                            //if they guess right, they win!
                            Say("You guessed the number correctly!");
                            //quit the current game loop
                            break;
                        }
                        if(guess > number)
                        {
                            //too high!
                            Say("Too high! Guess again!");
                        }
                        else if(guess < number)
                        {
                            //too low!
                            Say("Too low! Guess again!");
                        }
                    }
                }
                else
                {
                    Say("Goodbye!");
                    //break out of the while loop
                    return;
                }
            }
        }
    }
}