【Java例题】1.1计算n的阶乘

 package study;
 import java.util.*;
 import java.math.*;

 public class myClass {
     public static void main(String[] args){
         System.out.println("请输入x的值");
         Scanner in=new Scanner(System.in);
         int x=in.nextInt();
         long ans = 1;
         for(int i=1;i<=x;i++){
             ans=ans*i;
         }
         System.out.println("x的阶乘是"+ans);
     }
 }