Question

Write a Java Program to find the sum of the given series:- S=2-4+6-8+........upto n​

Answer 1

Answer:

public class SumOfSeries{

public static void main(String args[]){

int n = 20;int sum =0;

for(int i=2;i<=n;i=i+2){

if(i%4==0){ sum=sum-i;}

else{ sum=sum+i;}