求1-1/2+1/3.....1/100

import java.util.Scanner;
public class For02{
    public static void main(String[] args){
    
    //Scanner myScanner = new Scanner(System.in);
    System.out.println("求1-1/2+1/3.....1/100");
    
    //int num = myScanner.nextInt();
    double sum =0;
    
    for(int num=1;num<=100;num++){
        if(num%2==0){
            sum -= 1.0/num;
            System.out.println("偶数sum:"+sum);

    

        }else{
            sum += 1.0/num;
            System.out.println("奇数sum:"+sum);
        }
        
    }//结束for循环
    System.out.println("sum:"+sum);
    
    
    
    
    } //结束主方法
                                          
}