Java 编程

Question

用java编程怎么做第五题，急急急

Answer 1

public class Demo3 {public static void main(String[] args) {double sum=0,ji=1;for(double i=1;i<=100;i++){ji=ji*i;if(i%2==0)sum=sum-1/ji;else sum=sum+1/ji;}System.out.println(sum);}}