Console.WriteLine("10+20={0}\n10-20={2}\n10*20={1}\n10/20={3}", 10 + 20, 10 * 20, 10 - 20, 10 / 20);
kodingwindow@kw:~/csharp$ dotnet run 10+20=30 10-20=-10 10*20=200 10/20=0 kodingwindow@kw:~/csharp$