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

public class PI {

	public static void main(String[] args) {

		// 4(1-1/3+1/5-1/7+1/9-1/11+1/13-⋯-1/2𝑖−1+1/2𝑖+1)
		double pi = 0;
		int i = 10000;
		while (i <= 100000) {
			if (i % 2 == 0) {
				pi = pi + 1 / (2 * i + 1);
			} else {
				pi = pi - 1 / (2 * i + 1);
			}
			i++;
		}
		pi = 4 * pi;
		System.out.println(pi);
	}

}