Урок 2

class Program
    {
        static void Main(string[] args)
        {
            double firstNumber, secondNumber;
            string userName;
            Console.WriteLine("Enter your name: ");
            userName = Console.ReadLine();
            Console.WriteLine("Welcome {0}!", userName);
            Console.WriteLine("Please, type a number:");
            firstNumber = Convert.ToDouble(Console.ReadLine());
            Console.WriteLine("Now type another number:");
            secondNumber = Convert.ToDouble(Console.ReadLine());

            Console.WriteLine("The sum of {0} and {1} is {2}.", firstNumber, secondNumber,
                firstNumber + secondNumber);

            Console.WriteLine("The result of subtracting {0} from {1} is {2}", secondNumber, firstNumber,
                firstNumber - secondNumber);

            Console.WriteLine("The product of {0} and {1} is {2}", firstNumber, secondNumber,
                firstNumber * secondNumber);

            Console.WriteLine("The result of dividing {0} by {1} is {2}", firstNumber, secondNumber,
                firstNumber / secondNumber);

            Console.WriteLine("The remainder after dividing {0} by {1} is {2}", firstNumber, secondNumber,
                firstNumber % secondNumber);

            Console.ReadKey();
        }
    }

class Program
    {
        static void Main(string[] args)
        {
            // Define variables
            double priceEntry, priceExit, volume, pnl;

            // Entry price request
            Console.WriteLine("Enter entry price:");
            priceEntry = Convert.ToDouble(Console.ReadLine());

            // Exit price request
            Console.WriteLine("Enter exit price:");
            priceExit = Convert.ToDouble(Console.ReadLine());

            // Volume request
            Console.WriteLine("Enter volume:");
            volume = Convert.ToDouble(Console.ReadLine());

            // Pnl processing
            pnl = (priceExit - priceEntry) * volume;
            
            // Results output
            Console.WriteLine("Your trade profit in points is: {0}", pnl);
            Console.WriteLine("You trade profit in procents is: {0}", ((priceExit - priceEntry)/priceEntry)*100);

            Console.ReadKey();
        }
    }