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

import java.util.Scanner;
public class Pi {
    public static void main(String args[]){
        Scanner sc = new Scanner(System.in);
        int num = sc.nextInt();
        double result = 0;
        for (int i = 1; i <= num; i++){
            result += Math.pow(-1, i+1) / (2*i - 1);
        }
        result *= 4;
        System.out.println(result);
    }
}