N!

Problem Description

Given an integer N(0 ≤ N ≤ 10000), your task is to calculate N!

 

 

Input

One N in one line, process to the end of file.

 

 

Output

For each N, output N! in one line.

 

 

Sample Input

1 2 3

 

 

Sample Output

1 2 6

 

 

一个简单的大数练习

AC代码：

import java.math.BigDecimal;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        while (sc.hasNext()) {
            int num = sc.nextInt();
            BigDecimal result = BigDecimal.valueOf(1);
            for (int i = 1; i <= num; i++) {
                result = result.multiply(BigDecimal.valueOf(i));
            }
            System.out.println(result);
        }
    }
}