14. Polymorphism: Overloading vs Overriding

class Calculator {
    // Overloading: Same name, different parameters (Compile-time)
    int add(int a, int b) { return a + b; }
    int add(int a, int b, int c) { return a + b + c; }
}

class ScienceCalculator extends Calculator {
    // Overriding: Same name, same parameters (Runtime)
    @Override
    int add(int a, int b) {
        System.out.println("Adding in Science Mode");
        return a + b;
    }
}

public class Main {
    public static void main(String[] args) {
        Calculator calc = new ScienceCalculator();
        
        // Compiler decides which 'add' based on parameters (Overloading)
        System.out.println(calc.add(5, 10, 15)); 
        
        // JVM decides which 'add' based on object type (Overriding)
        System.out.println(calc.add(5, 10));
    }
}