# Recursive Factorial method. : Function Definition « Language Basics « C# / C Sharp

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Recursive Factorial method.
 ```  using System; public class FactorialTest {    public static void Main( string[] args )    {       for ( long counter = 0; counter <= 10; counter++ )          Console.WriteLine( "{0}! = {1}", counter, Factorial( counter ) );    }     public static long Factorial( long number )    {       if ( number <= 1 )          return 1;       else          return number * Factorial( number - 1 );    }  }                ```
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