How can I write these variables into one line of code in C#?

Question

I am new to C#, literally on page 50, and i am curious as to how to write these variables in one line of code:

using System; using System.Collections.Generic; using System.Linq; using System.Text;  namespace consoleHelloWorld {     class Program     {         static void Main(string[] args)         {              int mon = DateTime.Today.Month;             int da = DateTime.Today.Day;             int yer = DateTime.Today.Year;             var time = DateTime.Now;              Console.Write(mon);             Console.Write("." + da);             Console.WriteLine("." + yer);         }     } } 

I am coming from JavaScript where to do this it would look like this:

document.write(mon+'.'+da+'.'+yer); 

Any help here is appreciated.

Answer 1

Look into composite formatting:

Console.WriteLine("{0}.{1}.{2}", mon, da, yer); 

You could also write (although it's not really recommended):

Console.WriteLine(mon + "." + da + "." + yer); 

And, with the release of C# 6.0, you have string interpolation expressions:

Console.WriteLine($"{mon}.{da}.{yer}");  // note the $ prefix. 

Answer 2

You can do your whole program in one line! Yes, that is right, one line!

Console.WriteLine(DateTime.Now.ToString("yyyy.MM.dd")); 

You may notice that I did not use the same date format as you. That is because you should use the International Date Format as described in this W3C document. Every time you don't use it, somewhere a cute little animal dies.