Write a program to calculate the result of the formula pi in java 𝜋=4(1−1/3+1/5−1/7+1/9−1/11+1/13−⋯−1/2𝑖−1+1/2𝑖+1) with 10000 ≤ i ≤ 100000

java
import java.util.Scanner;
public class Main {
  public static void main(String[] args) {
    Scanner in = new Scanner(System.in);
    int n = in.nextInt();
    double pi = 0;
    for(int i=1; i<=n; i++) {
      if(i%2==0) {
        pi = pi - (1.0/(2*i-1));
      } else {
        pi = pi + (1.0/(2*i-1));
      }
    }
    pi = 4 * pi;
    System.out.println(pi);
  }
}