factorial

public class Factorial
{
    public static void main( String[] args )
    {
        for( int i = 0; i < 7; i++ )
        {
            System.out.println( "factorial(" + i + ") = " + factorial(i) );
        }
    }

    public static long factorial( long n )
    {
        if( n <= 1 )
        {   return 1;
        }
        else
        {   return n * factorial( n - 1 );
        }
    }
}