Question

Write a program to print the sum of the following series upto 'n' term. s=2-4+6-8+10-12…......n

Answer 1

s=( x:x is even number, where2x-4x+6x-8x....n)

Answer 2

Question:-

Write a program to find the sum of the following series.

S=2-4+6-8+10-12+14-.....N terms.

Program:-

import java.util.*;

class Sum

{

public static void main(String args[])

{

Scanner sc=new Scanner(System.in);

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

int n=sc.nextInt();

int b=2, i=1, s=0;

for(i=1;i<=n;i++, b+=2)

{

if(i%2==1)

s+=b;

else

s-=b;

}

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

}

}