How to Make a Calculator in C# ?

C# is an object-oriented, modern programming language that was created by Microsoft. It runs on the .NET Framework. C# is very close to C/C++ and Java programming languages. In this article, we will learn how to create a calculator in  C#. 

Basic Functions of Calculator:

• Addition of two numbers.
• Difference between two numbers.
• Product of two numbers.
• Division of two numbers.

Approach:

• Declare local variables num1 and num2 for two numeric values.
• Enter the choice.
• Takes two numbers, num1, and num2.
• do-while jump to an operator selected by the user.
• Display the operation result.
• Exit

Example:

C#

// Implementing a calculator in
// C# using switch statement.
using System;
using System.Text;
using System.Threading.Tasks;

namespace calculator_c_sharp
{
    class Program
    {
        static void Main(string[] args)
        {
            string value;
            do
            {
                int res;
                Console.Write("Enter first number:");
                int num1 = Convert.ToInt32(Console.ReadLine());
                Console.Write("Enter second number:");
                int num2 = Convert.ToInt32(Console.ReadLine());
                Console.Write("Enter symbol(/,+,-,*):");
                string symbol = Console.ReadLine();

                switch (symbol)
                {
                    case "+":
                        res = num1 + num2;
                        Console.WriteLine("Addition:" + res);
                        break;
                    case "-":
                        res = num1 - num2;
                        Console.WriteLine("Subtraction:" + res);
                        break;
                    case "*":
                        res = num1 * num2;
                        Console.WriteLine("Multiplication:" + res);
                        break;
                    case "/":
                        res = num1 / num2;
                        Console.WriteLine("Division:" + res);
                        break;
                    default:
                        Console.WriteLine("Wrong input");
                        break;
                }
                Console.ReadLine();
                Console.Write("Do you want to continue(y/n):");
                value = Console.ReadLine();
            }
            while (value=="y" || value=="Y");
        }
    }

}

Output:

Addition of two numbers:

Subtraction of two numbers:

Multiplication of two numbers:

Division of two numbers: