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Java - Calculate Factorial

This code snippet calculates the factorial of a number up to 20. Because of the large numbers it can't go higher then 20, 21 factorial is: 51.090.942.171.709.440.000. There are two methods in this code, one for calculating it with recursion and one non-recursive. ? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 public class Factorial {      public static void main(String[] args) {          System.out.println(factorialRecursion( 20 ));          System.out.println(factorial( 20 ));      }      public static long factorialRecursion( long l) {          if (l < 2 )              return 1 ;          else              return l * factorialRecursion(l - 1 );      }      public static long factorial( int fact) {          long result = 1 ;                     for ( int i = 1 ; i <= fact; ++i) {              result *= i;          }          return re