简单n!

点击打开链接

JAVA:

import java.math.BigInteger;
import java.util.Scanner;

public class Main {
	private static Scanner cin = new Scanner(System.in);
	public static void main(String[] args) {
		int n;
		while(cin.hasNext()){
			n = cin.nextInt();
			BigInteger bigint= new BigInteger("1");
			System.out.println("0! = 1");
			for(int i = 1; i <= n; i++){
				String temp = Integer.toString(i);
				bigint = bigint.multiply(new BigInteger(temp));
				System.out.println(i+"! = "+bigint);
			}
			System.out.println();
		}
	}
} 

Python:

while True: 
    n = input()
    sum=1
    print "0! = 1"
    for i in range(1,n+1):
          sum*=i
          print str(i)+"! = "+str(sum)
    print
exit