Java - Calculate Factorial Examples

        private static BigDecimal calculateFactorial (int number) {
            BigDecimal factorial = BigDecimal.ONE;
            for (int i = 1; i <= number; i++) {
                factorial = factorial.multiply(new BigDecimal(i));
            }
            return factorial;
        }

    public static BigInteger calculateFactorial (BigInteger input) {
        BigInteger factorial = BigInteger.ONE;
        for (BigInteger i = BigInteger.ONE;
             i.compareTo(input) <= 0;
             i = i.add(BigInteger.ONE)) {
            factorial = factorial.multiply(i);
        }
        return factorial;
    }