public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        System.out.println("Calculate the value of the Pi with a given accuracy using the formula: Pi/8=1/(1*3)+1/(5*7)+1/(9*11)...");
        double epsilon = 0;
        boolean isIncorrect;
        do {
            isIncorrect = false;
            try {
                epsilon = Double.parseDouble(scan.nextLine());
            } catch (NumberFormatException e) {
                System.err.println("Enter the double value!");
                isIncorrect = true;
            }

            if (!(isIncorrect || epsilon < 1 && epsilon > 0)) {
                System.err.println("Enter the value in range [0, 1]");
                isIncorrect = true;
            }
        } while (isIncorrect);

        double preStep;
        int counter = 1;
        double pi = 0;
        do {
            preStep = pi;
            pi += (double) 8 / (counter * (counter + 2));
            counter += 4;
        } while (Math.abs((pi - preStep)) > epsilon);

        System.out.printf("The Pi with your accuracy is: %f", pi);
        scan.close();
    }