C# calculator program 🖩

[@BroCodez]

using System; namespace MyFirstProgram { class Program { static void Main(string[] args) { do { double num1 = 0; double num2 = 0; double result = 0; Console.WriteLine("------------------"); Console.WriteLine("Calculator Program"); Console.WriteLine("------------------"); Console.Write("Enter number 1: "); num1 = Convert.ToDouble(Console.ReadLine()); Console.Write("Enter number 2: "); num2 = Convert.ToDouble(Console.ReadLine()); Console.WriteLine("Enter an option: "); Console.WriteLine("\t+ : Add"); Console.WriteLine("\t- : Subtract"); Console.WriteLine("\t* : Multiply"); Console.WriteLine("\t/ : Divide"); Console.Write("Enter an option: "); switch (Console.ReadLine()) { case "+": result = num1 + num2; Console.WriteLine($"Your result: {num1} + {num2} = " + result); break; case "-": result = num1 - num2; Console.WriteLine($"Your result: {num1} - {num2} = " + result); break; case "*": result = num1 * num2; Console.WriteLine($"Your result: {num1} * {num2} = " + result); break; case "/": result = num1 / num2; Console.WriteLine($"Your result: {num1} / {num2} = " + result); break; default: Console.WriteLine("That was not a valid option"); break; } Console.Write("Would you like to continue? (Y = yes, N = No): "); } while (Console.ReadLine().ToUpper() == "Y"); Console.WriteLine("Bye!"); Console.ReadKey(); } } }

[@dreamboy1659]

//Mine - which allow user to do operation with previous result //Thank you for the lecture^^! internal class Program { private static void Main(string[] args) { double a = 0, b = 0, result = 0; string operato; string cont1, cont2; bool true1 = true, true2 = true; while(true2==true) { Console.WriteLine("Enter a: "); a = double.Parse(Console.ReadLine()); true1 = true; while (true1 == true) { Console.WriteLine("Enter b: "); b = double.Parse(Console.ReadLine()); operato = ""; while(operato != "+" && operato != "-" && operato != "*" && operato != "/") { Console.WriteLine("What do you want to do now? (+; -; *; /)"); operato = Console.ReadLine(); } switch (operato) { case ("+"): result = a + b; break; case ("-"): result = a - b; break; case ("*"): result = a * b; break; case ("/"): result = a / b; break; } Console.WriteLine("Result is: " + result); cont1 = ""; while (cont1 != "Y" && cont1 != "N") { Console.WriteLine("Do you want to continue do calculating with the result? (Y/N)"); cont1 = Console.ReadLine(); } switch (cont1) { case ("Y"): a = result; true1 = true; break; case ("N"): cont2 = ""; while (cont2 != "Y" && cont2 != "N") { Console.WriteLine("Then do you want to do another operation or not? (Y/N)"); cont2 = Console.ReadLine(); } switch (cont2) { case ("Y"): true1 = false; true2 = true; break; case ("N"): true1 = false; true2 = false; break; } break; } } } Console.WriteLine("Ok, bye then!"); Console.ReadKey(); } }

[@turkyt]

Give as ne video on this topic please with new method 😔

[@engirckt5410]

your lessons are better than many c# lessons out there! Thank you for all of the quality lessons you made!

[@hamzasadouk4741]

Fantastic video , well explained and easy to follow . the only thing i would like to add for people watching this later would be to make sure that num2 is not 0 to avoid division by 0 double num2=0; . . . . SAME CODE AS THE ONE IN THE VIDEO . . while (num2 == 0) { Console.WriteLine(" Please enter number 2 diffrent from 0 :"); num2 = Convert.ToDouble(Console.ReadLine()); }

[@leg1187]

Thank you mate. Making a calculator In C# is easy but adding support for decimals and negative numbers is a bit tricky you helped me!

[@Ken2K5]

This is better than my instructor's lesson, now he is wondering why I already tackled his lessons even we never met yet

[@spartanuk1977]

I am 14 and cannot believe I understand all of this code, thank you so much

[@ivanpedro9151]

currently learning how to code, thanks for the help

[@alexmacmillan2690]

Program is simple, but I’m add check on integer value, because enter params can be string

[@shiroy2]

4:57 nice

[@simik4830]

for the algorithm!

[@MarbinCastro502]

NIce

[@spartanranger]

Thanks for the video Bro.

[@AzianPrincess]

Thank you so much, Sirr!❤️‍🔥

[@AdrAtom_1]

This is not really a calculator because you can just calculate 2 numbers . Making an array would help a lot but would need more cases. Anyways thanks!

[@user-gk9fn8pu1f]

top

[@Iamaqwerte]

Thanks man! It's a very useful tutorial for beginners like me!

[@whitedinamo]

lesson check😇

[@michalski9141]

what if I wanted to make sure the user typed in y or n when asked if they want to continue?

Thanks Bro!

[@rivazmardani]

makasih gan

[@monn1815]

Why don't you use github for uploading the code?

[@BroCodez]

I'm lazy

[@paavobjorkbacka7254]

Doesnt work, it les me put numbers like 2 but no 2.2

[@jawadkassomeh3207]

try putting in an "," instead of an "."

[@Taril69]

Hey bro, How can i lock the "num1" and "num2" to only number/integers. because when add a letter it crashes

[@Nikola95inYT]

You basically you need to separate taking input and assigning variable. After taking input, assign it to a temporary variable and check if it contains only digits, if it is, convert variable to double in order to make operations. You can put it inside loop, so in case of invalid input user will be told to enter again.

[@Taril69]

Alright! thanks for the reply :) @@Nikola95inYT

[@Sasuke46525]

using System; namespace EnumBasedCalculator { class Program { // Define operations as an enum enum Operation { Addition = 1, Subtraction = 2, Multiplication = 3, Division = 4 } static void Main(string[] args) { Console.WriteLine("Welcome to the Enum-Based Calculator!"); Console.WriteLine("Supported operations:"); Console.WriteLine("1 - Addition (+)"); Console.WriteLine("2 - Subtraction (-)"); Console.WriteLine("3 - Multiplication (*)"); Console.WriteLine("4 - Division (/)"); while (true) { // Get user operation choice Console.Write(" Choose an operation (1-4): "); if (!int.TryParse(Console.ReadLine(), out int operationInput) || !Enum.IsDefined(typeof(Operation), operationInput)) { Console.WriteLine("Invalid choice. Please select a number between 1 and 4."); continue; } Operation operation = (Operation)operationInput; // Get the first number Console.Write("Enter the first number: "); if (!double.TryParse(Console.ReadLine(), out double firstNumber)) { Console.WriteLine("Invalid input. Please enter a valid number."); continue; } // Get the second number Console.Write("Enter the second number: "); if (!double.TryParse(Console.ReadLine(), out double secondNumber)) { Console.WriteLine("Invalid input. Please enter a valid number."); continue; } // Perform the calculation double result = PerformOperation(operation, firstNumber, secondNumber); // Check if the result is NaN (for division by zero) if (double.IsNaN(result)) { Console.WriteLine("Error: Division by zero is not allowed."); } else { Console.WriteLine($"The result is: {result}"); } // Ask if the user wants to perform another calculation Console.Write("Do you want to perform another calculation? (Y/N): "); string response = Console.ReadLine().Trim().ToLower(); if (response != "y") { Console.WriteLine("Thank you for using the calculator. Goodbye!"); break; } } } static double PerformOperation(Operation operation, double num1, double num2) { switch (operation) { case Operation.Addition: return num1 + num2; case Operation.Subtraction: return num1 - num2; case Operation.Multiplication: return num1 * num2; case Operation.Division: return num2 != 0 ? num1 / num2 : double.NaN; default: throw new InvalidOperationException("Invalid operation."); } } } }

[@iliyan1014]

Work for fractions too?

[@karolissad.4270]

if you mean decimal fractions yes, but it won't understand if you enter something like 1/3

[@giacomorinaldi]

hello, why you use this code ? $"Your result: {num1} + {num2} = " + result ? it's not creare the $ and the num in the parenthesis

[@AdityaSharma-qt1ig]

hey bro first of all thank you soo much for such a helpful content I live in Melbourne and regularly watch your videos I need your help in a question I will be soo thank full to you if you can help me Create a Visual C Sharp program that asks for the password three times. If the password is correct, it will welcome the user, otherwise, it will say Goodbye and END the program. Run the above program and extend it to accept only alphanumeric input - for example, if a user enters digits only or characters only, it should not accept that as input, and ensures input is alphanumeric, and a mix of digits, numbers and one special character.

[@jorgematos863]

bro why double numb = 0 and not only double numb;

[@crazytheorist118]

Chad coding

[@denisdospel2975]

doing this with no experience in IT before, when you typed switch i stopped the video and made the code myself and it ended up like this: using System.Reflection; using System.Runtime.InteropServices; namespace ConsoleApp3 { internal class Program { static void Main(string[] args) { double num1 = 0; double num2 = 0; double result = 0; bool again = true; while (again) { String answer = ""; Console.WriteLine("------------------"); Console.WriteLine("Calculator Program"); Console.WriteLine("------------------"); Console.Write("Enter number 1: "); num1 = Convert.ToDouble(Console.ReadLine()); Console.Write("Enter number 2: "); num2 = Convert.ToDouble(Console.ReadLine()); Console.WriteLine("Select method"); Console.WriteLine("\t+ : Add"); Console.WriteLine("\t- : Substract"); Console.WriteLine("\t* : Multiply"); Console.WriteLine("\t/ : Divide"); switch (Console.ReadLine()) { case "+": result = num1 + num2; Console.WriteLine("Your result: " + num1 + "+" + num2 + "=" + result); break; case "-": result = num1 - num2; Console.WriteLine("Your result: " + num1 + "-" + num2 + "=" + result); break; case "*": result = num1 * num2; Console.WriteLine("Your result: " + num1 + "*" + num2 + "=" + result); break; case "/": result = num1 / num2; Console.WriteLine("Your result: " + num1 + "/" + num2 + "=" + result); break; } Console.WriteLine("Do you want to Start another calculation? Y/N: "); answer = Console.ReadLine(); answer = answer.ToUpper(); if (answer == "Y") { again = true; } else { again = false; } } Console.WriteLine("GG"); Console.ReadKey(); } } } you are truly an amazing teacher. at the end is nice to see that do makes the whole while method way simpler. thank you for the videos!!

[@haroonrasheed1117]

thanks

[@RighteousBruce]

Mine wont even launch

[@jawadkassomeh3207]

i think you like 3,14

[@definitelynotchris4776]

thanks daddy

[@memy4460]

comment

[@harisshafi01]

using System.Runtime.CompilerServices; using System.Threading.Channels; double firstNum = 0; double secondNum = 0; double result = 0; do { Console.WriteLine("----------------"); Console.WriteLine("-- Calculator --"); Console.WriteLine("----------------"); Console.Write("Enter the first Num : "); firstNum = Convert.ToDouble(Console.ReadLine()); Console.Write("Enter the second Num : "); secondNum = Convert.ToDouble(Console.ReadLine()); Console.WriteLine("Choose Options"); Console.WriteLine("\t+ : ADD "); Console.WriteLine("\t- : SUBSTRACT "); Console.WriteLine("\t* : MULTIPLY"); Console.WriteLine("\t/ : DIVIDE"); Console.Write("Enter the Options : "); switch(Console.ReadLine()) { case "+": result = firstNum + secondNum; Console.WriteLine($"Result : {firstNum} + {secondNum} = "+result); break; case "-": result = firstNum - secondNum; Console.WriteLine($"Result : {firstNum} - {secondNum} = " + result); break; case "*": result = firstNum * secondNum; Console.WriteLine($"Result : {firstNum} * {secondNum} = " + result); break; case "/": result = firstNum / secondNum; Console.WriteLine($"Result : {firstNum} / {secondNum} = " + result); break; default: Console.WriteLine("That was not a valid option"); break; } Console.WriteLine("Would you like to continue (Y/N) :"); }while (Console.ReadLine().ToUpper() =="Y"); Console.WriteLine("Thanks"); Console.ReadKey();

[@goroland6904]

The Code is good: Console.Writeline(Source + "Trust me bro");

[@Go_view]

Console.WritLine("greate");