大数类型解决阶乘

解题思路:可以直接用大数类型解决

注意事项:Java中大数类型是对象，所以需要用到方法multiply

参考代码:

import java.math.BigInteger;

import java.util.Scanner;

public class One {

public static void main(String[] args) {

// TODO Auto-generated method stub

Scanner sc = new Scanner(System.in);

int i = sc.nextInt();

BigInteger big = new BigInteger("1");

for (int j = 1; j <= i; j++) {

big = big.multiply(new BigInteger(String.valueOf(j)));

}

System.out.print(big);

}

}