public class Main {
    public static void main(String[] args) {
        int result = add(5, 3);
        System.out.println("The sum is: " + result);
    }

    public static int add(int a, int b) {
        return a + b;
    }

    public static int div(int a, int b) {
        if (b == 0) {
            throw new IllegalArgumentException("Cannot divide by zero");
        }
        return a / b;
    }

    public static int multi(int a, int b) {
        return a * b;
    }
}