---
title: "Basic Calculator"  
description: "C# is a simple, modern, general-purpose, object-oriented programming language. Making Calculator is one of the basic program by which we can learn and"  
author: "Abhishek Srivasatava"  
published: 2016-09-12  
updated: 2018-03-16  
canonical: https://www.mindstick.com/blog/11202/basic-calculator  
category: "c#"  
tags: ["c#"]  
reading_time: 2 minutes  

---

# Basic Calculator

C# is a simple, modern, general-purpose, object-oriented [programming language](https://www.mindstick.com/articles/329035/5-most-in-demand-programming-languages-to-consider-for-your-app-development-in-2022). Making [Calculator](https://www.mindstick.com/articles/38/calculator-in-asp-dot-net-using-javascript) is one of the basic program by which we can learn and revise many concept. An arithmetic [operator](https://www.mindstick.com/blog/144/union-intersection-and-except-operator-in-sql-server) is a symbol that tells the [compiler](https://www.mindstick.com/articles/27/just-in-time-compiler) to perform specific mathematical [operation](https://www.mindstick.com/forum/33917/how-to-callback-operation-using-delegate-in-c-sharp).

So, I have decided to make a calculator by using switch and do while case. Below are some syntaxes which I have used in the program:

**Console & Convert:** They are the pre defined classes into the system.

**Convert.ToInt32:** It is used to convert the string into integer.

**Console.WriteLine():** This syntax is used for output of the program or any useful [relevant information](https://answers.mindstick.com/qa/105781/how-to-interpret-financial-news-and-filter-relevant-information-for-investing).

**Console.ReadLine():** This syntax is used to take the [input from the user](https://www.mindstick.com/forum/158952/what-are-the-different-methods-for-reading-input-from-the-user-in-python) side.

##### Here is the complete code:

```
using System;using System.Collections.Generic;using System.Text;namespace Program{    class Program    {        static void Main(string[] args)        {            int Num1 = 0, Num2 = 0, result, opt=0;            do            {                Console.WriteLine("Main Menu");                Console.WriteLine("1. Addition");                Console.WriteLine("2. Subtraction");                Console.WriteLine("3. Multiplication");                Console.WriteLine("4. Division");                Console.WriteLine("0. terminate the program");                 Console.Write("Enter the Operation you want to perform : ");                opt = Convert.ToInt32(Console.ReadLine());                                if (opt == 4)                    Console.WriteLine("Please don't enter 2nd number as zero");                 if (opt >= 1 && opt <= 4)                {                    Console.Write("Enter the First Number : ");                    Num1 = Convert.ToInt32(Console.ReadLine());                     Console.Write("Enter the Second Number : ");                    Num2 = Convert.ToInt32(Console.ReadLine());                    if (opt == 4 && Num2 == 0)                        Console.WriteLine("Not possible");                }                 switch (opt)                {                    case 1:                        result = Num1 + Num2;                        Console.WriteLine("Addtion of {0} & {1} is equal to  {2}\n",                                                    Num1, Num2, result);                        break;                    case 2:                        result = Num1 - Num2;                        Console.WriteLine("Subtraction of {0} & {1} is equal to  {2}\n",                                                     Num1, Num2, result);                        break;                    case 3:                        result = Num1 * Num2;                        Console.WriteLine("Multiplication of {0} & {1} is equal to  {2}\n",                                                     Num1, Num2, result);                        break;                    case 4:                        if (Num2 == 0)                            break;                        result = Num1 / Num2;                        Console.WriteLine("Division of {0} & {1} is equal to  {2}\n",                                                     Num1, Num2, result);                        break;                    default:                        if (opt != 0)                            Console.WriteLine("Invalid option \n");                        else                            Console.WriteLine("End of the program \n ");                         break;                }            } while (opt != 0);            Console.ReadLine();        }    }}
```

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##### Output:

**\**

![Basic Calculator](https://www.mindstick.com/blogs/061d4b50-9cbf-4576-9435-d9fccb4c9794/images/540828e2-1c77-4e2f-8738-94bdd92a7a9f.png)\

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---

Original Source: https://www.mindstick.com/blog/11202/basic-calculator

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