Proposed exercise
Write a program which asks the user for two numbers and an operation to perform on them (+,-,*,x,/) and displays the result of that operation, as in this example:
Enter first number: 5
Enter operation: +
Enter second number: 7
5+7=12
Note: you MUST use "if", not "switch"
Output
Solution
using System; public class CalculatorIf { public static void Main() { int a, b; char operation; Console.Write("Enter first number: "); a = Convert.ToInt32(Console.ReadLine()); Console.Write("Enter operation: "); operation = Convert.ToChar(Console.ReadLine()); Console.Write("Enter second number: "); b = Convert.ToInt32(Console.ReadLine()); if (operation=='+') Console.WriteLine("{0} + {1} = {2}", a, b, a+b); else if (operation=='-') Console.WriteLine("{0} - {1} = {2}", a, b, a-b); else if ((operation=='x') || (operation=='*')) Console.WriteLine("{0} * {1} = {2}", a, b, a*b); else if (operation=='/') Console.WriteLine("{0} / {1} = {2}", a, b, a/b); else Console.WriteLine("Wrong Character"); } }