Question

Java program to print the output of following series
1-2+3-4+5-6.......n​

Answer 1

// Java program to find sum of

// first n terms of the given series

import java.util.*;

class GFG

{

static int calculateSum(int n)

{

// when n is odd

if (n % 2 == 1)

return (n + 1) / 2;

// when n is not odd

return -n / 2;

}

// Driver code

public static void main(String ar[])

{

// no. of terms to find the sum

int n = 8;

System.out.println(calculateSum(n));

}

}