// Importing functionalities from the System namespace to use in our program

using System;

​

// Declaring a space (namespace) for our calculator program to help organize the code

namespace ConsoleCalculator

{

    // Defining a class named 'Program' - think of it as a blueprint for our application

    class Program

    {

        // The entry point of our program where the execution begins

        static void Main(string[] args)

        {

            // A flag to keep the calculator running in a loop

            bool keepRunning = true;

            // Display a welcome message to the user

            Console.WriteLine("Welcome to the Console Calculator!\n");

​

            // While loop that keeps running as long as 'keepRunning' is true

            while (keepRunning)

            {

                // Asking for the first number and storing it

                Console.WriteLine("Enter the first number:");

                // Reading the input from the user, converting it from string to double (a type that can store decimal numbers)

                double num1 = Convert.ToDouble(Console.ReadLine());

​

                // Asking for the operator (e.g., +, -, *, /) and storing it

                Console.WriteLine("Enter the operator (+, -, *, /):");

                string op = Console.ReadLine();

​

                // Asking for the second number and storing it

                Console.WriteLine("Enter the second number:");

                double num2 = Convert.ToDouble(Console.ReadLine());

​

                // Variable to store the result of the operation

                double result;

​

                // Evaluating the operator provided by the user

                switch (op)

                {

                    // If the operator is '+', add num1 and num2

                    case "+":

                        result = num1 + num2;

                        break;

                    // If the operator is '-', subtract num2 from num1

                    case "-":

                        result = num1 - num2;

                        break;

                    // If the operator is '*', multiply num1 by num2

                    case "*":

                        result = num1 * num2;

                        break;

                    // If the operator is '/', divide num1 by num2

                    case "/":

                        // Check for division by zero to prevent errors

                        if (num2 != 0)

                        {

                            result = num1 / num2;

                        }

                        else

                        {

                            Console.WriteLine("Division by zero is not allowed.");

                            continue; // Skip the rest and start the loop again

                        }

                        break;

                    // If the operator is not recognized, inform the user and start the loop again

                    default:

                        Console.WriteLine("Invalid operator.");

                        continue;

                }

​

                // Display the result of the operation

                Console.WriteLine($"Result: {result}");

​

                // Asking the user if they want to perform another calculation

                Console.WriteLine("\nDo you want to perform another calculation? (yes/no)");

                string answer = Console.ReadLine();

                // If the answer is not 'yes', set 'keepRunning' to false to exit the loop

                if (answer.ToLower() != "yes")

                {

                    keepRunning = false;

                }

            }

​

            // Thank the user for using the calculator once they're done

            Console.WriteLine("Thank you for using the Console Calculator!");

        }

    }

}

​