Contoh Factorial di Java™

import java.math.BigInteger;
public class Factorial {
    public static void main(String[] args) {
        BigInteger n = BigInteger.ONE;
        for (int i=1; i<=20; i++) {
            n = n.multiply(BigInteger.valueOf(i));
            System.out.println(i + "! = " + n);
        }
    }
}

Contoh Output

Output
1! = 1 2! = 2 3! = 6 4! = 24 5! = 120 6! = 720 7! = 5040 8! = 40320 9! = 362880 10! = 3628800 11! = 39916800 12! = 479001600 13! = 6227020800 14! = 87178291200 15! = 1307674368000 16! = 20922789888000 17! = 355687428096000 18! = 6402373705728000 19! = 121645100408832000 20! = 2432902008176640000