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  1. using System;
  2.  
  3. public class Test
  4. {
  5.     public static bool IsPalindrome(string value)
  6.     {
  7.         if ( string.IsNullOrEmpty(value) )
  8.             return true;
  9.  
  10.         return isPalindrome(value, 0, value.Length - 1);
  11.     }
  12.  
  13.     private static bool isPalindrome(string value, int startChar, int endChar)
  14.     {
  15.         if ( value[startChar] != value[endChar] )
  16.             return false;
  17.  
  18.         if ( startChar >= endChar )
  19.             return true;
  20.  
  21.         return isPalindrome(value, startChar + 1, endChar - 1);
  22.     }
  23.  
  24. 	public static void Main()
  25. 	{
  26.         Console.WriteLine(IsPalindrome(""));
  27.         Console.WriteLine(IsPalindrome("1"));
  28.         Console.WriteLine(IsPalindrome("11"));
  29.         Console.WriteLine(IsPalindrome("121"));
  30.         Console.WriteLine(IsPalindrome("123"));
  31. 	}
  32. }
Success #stdin #stdout 0.02s 24072KB
comments (?)
stdin 
Standard input is empty
stdout 
True
True
True
True
False
https://ideone.com/k3GBLA
language:
C# (gmcs 5.20.1)
created:
10 years ago
visibility:
public

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