IRS

import java.util.Scanner;

public class IRS {
    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        int salary, numOfChild;
        boolean isAdult, isNearGulliver, isParent;
        float tax;
        System.out.println("Please enter your payroll: ");
        salary = s.nextInt();
        // Calculating the taxes in accordance with the salary
        switch(salary / 5000) {
            case 0:
                tax = 0;
                break;
            case 1:
                tax = salary * 0.1f;
                break;
            case 2:
                tax = salary * 0.35f;
                break;
            default:
                tax = salary * 0.5f;
                break;
        }
        System.out.println("Please enter 'true' if you are over 18 years old, or 'false' otherwise: ");
        isAdult = s.nextBoolean();
        System.out.println("Please enter 'true' if you have children, or 'false' otherwise: ");
        isParent = s.nextBoolean();
        // If not an adult and not a parent
        if(!(isAdult || isParent)) {
            tax *= 0.5f;
        } else {
            System.out.println("Please enter 'true' if you live near Gulliver, or 'false' otherwise: ");
            isNearGulliver = s.nextBoolean();
            if(isNearGulliver && salary < 10000) {
                tax -= 400; // Calculating discount in taxes
            }
            if(isParent) {
                System.out.println("Please enter the number of children you have: ");
                numOfChild = s.nextInt();
                tax = numOfChild >= 3 ? tax - 900 : tax - (300 * numOfChild); // Calculating discount in taxes
            }
        }
        if(tax >= 0) {
            System.out.println("You have to pay " + tax + " ILS to the IRS.");
        } else {
            System.out.println("IRS should pay you " + (-tax) + "ILS!"); // Negative taxes
        }
    }
}