Series

7. Program


7. How to Print this series ?
 
1, -4, 9, -25, 36, -49, 81.....N 



import java.util.Scanner;
class Series1
{
 public static void main(String[] args)
 {
  Scanner sc = new Scanner(System.in);
  int n = sc.nextInt();
  int i = 1, j=0;
  while(i <= n)
  {
   if(i%4 != 0)
   {
    j++;
    if(j%2 !=0)
    {
     System.out.print(i*i + ", ");
    }
    else
    {
     System.out.print(-(i*i) + ", ");
    }
   }
   i++;
  }
 }
}