Behaviour Design Pattern Introduction

How software learns to behave — one conversation at a time

🤔 A small story before we begin…

When I was a beginner, I thought programming was only about writing logic inside classes.

If I wanted something new to happen, I just added:

• one more if
• one more else
• one more method

It worked… until one day it didn’t.

The code became hard to read, hard to change, and scary to touch.
Every small change felt like pulling one card from a house of cards 🃏.

That’s when I learned something important:

Good software is not just about what objects are — it’s about how they behave and talk to each other.

That’s where Behaviour Design Patterns come in.

Let’s learn this like we’re explaining it to a curious child — slowly, clearly, and with real-life stories.

🧠 First things first: What is a Design Pattern?

Think of a design pattern like a proven recipe 🍲.

• Someone already faced a problem
• Tried many solutions