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
public class PiCalculator {
    public static void main(String[] args) {
        int number = 100000;
        double pi = 0;
        for (double i = 1; i < number; i++) {
            pi += (i % 2 == 0 ? 1 : -1) * (1 / (2 * i + 1));
        }
        pi = pi * 4;
        System.out.println(pi);
    }
}