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Ordinal suffix of an integer

/ Published in: C#
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The switches are a little ugly, but they are quick.

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  1. public static class IntExtensions
  2. {
  3.     public static string GetOrdinalSuffix(this int @this)
  4.     {
  5.         switch (@this % 100)
  6.         {
  7.             case 11:
  8.             case 12:
  9.             case 13:
  10.                 return "th";
  11.             default:
  12.                 switch (@this % 10)
  13.                 {
  14.                     case 1:
  15.                         return "st";
  16.                     case 2:
  17.                         return "nd";
  18.                     case 3:
  19.                         return "rd";
  20.                     default:
  21.                         return "th";
  22.                 }
  23.         }
  24.     }
  25. }

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