用Java语言编写程序，计算1-1/2+1/3-1/4+……+1/99-1/100

package javaapp;

 
public class Main {

  
    public static void main(String[] args) {
    
        double sum;
        sum=0.0;
        for(int i=1;i<=100;i++){
            if(i%2!=0)
            {
               sum+= 1.0/i;
            }else{
                sum-=1.0/i;
            }

        }
     System.out.println("1-1/2+1/3-1/4 + ……+1/99-1/ 100 ="+sum);
    }
}