Operations Between Numbers

import java.util.Scanner;

public class Demo {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);


        int n1 = Integer.parseInt(scanner.nextLine());
        int n2 = Integer.parseInt(scanner.nextLine());
        String operator = scanner.nextLine();

        double result = 0;

        if ("+".equals(operator)) {
            result = n1 + n2;
            if (result % 2 == 0) {
                System.out.printf("%d + %d = %.0f - even", n1, n2, result);
            } else if (result % 2 == 1) {
                System.out.printf("%d + %d = %.0f - odd", n1, n2, result);
            }
        } else if ("-".equals(operator)) {
            result = n1 - n2;
            if (result % 2 == 0) {
                System.out.printf("%d - %d = %.0f - even", n1, n2, result);
            } else if (result % 2 == 1) {
                System.out.printf("%d - %d = %.0f - odd", n1, n2, result);
            }
        } else if ("*".equals(operator)) {
            result = n1 * n2;
            if (result % 2 == 0) {
                System.out.printf("%d * %d = %.0f - even", n1, n2, result);
            } else if (result % 2 == 1) {
                System.out.printf("%d * %d = %.0f - odd", n1, n2, result);
            }
        } else if (n2 == 0 || n1 == 0) {
            System.out.printf("Cannot divide %d by zero", Math.max(n1, n2));

        } else if ("/".equals(operator)) {
            result = (double) n1 / (double) n2;
            System.out.printf("%d / %d = %.2f", n1, n2, result);
        } else if ("%".equals(operator)) {
            result = n1 % n2;
            System.out.println(n1 + " % " + n2 + " = " + (int) result);
        }
    }
}