Question

Write a programt print the sum of the series s=1-2+3-4+5+6+7...n

Answer 1

Answer:

import java .util.*;

class series

{

    public static void main()

     {

         Scanner sc= new Scanner(System.in);          

         System.out.println("enter an integer ");        

         int n = sc.nextInt();

         int s=0;

         for(int i=1; i<=n; i++)

         {

        s=s+i;

       }          

       System.out.println("sum is"+ s);

           }

       }

Explanation:

Answer 2

Question:-

Write a program to print the sum of the series.

S=1-2+3-4+5-6+....N

Code:-

import java.util.*;

class Series

{

public static void main(String args[])

{

Scanner sc = new Scanner(System.in);

System.out.print("Enter the total number of terms for series sum: ");

int n=sc.nextInt();

int s=0;

for(int j=1;j<=n;j++)

s+=(j%2!=0)?j:-j;

System.out.println("Sum is: "+s);

}

}