Csharp/CSharp Tutorial/Data Type/Integer format

Use ToString() to format integers

<source lang="csharp">using System;

class MainClass {

 public static void Main() { 
   int x = 21; 
   string str = x.ToString("X"); 
   Console.WriteLine(str); 

   str = x.ToString("D12"); 
   Console.WriteLine(str); 

 } 

}</source>

15
000000000021