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

class PiCalc {
  public static void main(String[] args) {
    double pi = 4.0;
    double div = 3.0;
    for (int i = 1; i <= 100000; i++) {
      if (i % 2 == 0) {
        pi -= 4 / div;
      } else {
        pi += 4 / div;
      }
      div += 2;
    }
    System.out.println(pi);
  }
}