What is the difference between object-oriented programming and functional programming?

In my final year of college, I worked on a group project where we developed a simple 2D game. We decided to use object-oriented programming principles for this project. Each character in the game was defined as an object, with properties like health, speed, and methods like move() and attack(). This approach allowed us to easily manage the characters’ behaviors and interactions. When we needed to add a new character, we simply created a new class that inherited from a base character class, making the code more maintainable. This hands-on experience helped me understand how OOP can enhance code organization and reusability.

During my part-time internship at a local startup, I was tasked with automating some repetitive data entry tasks. I used a functional programming approach by creating pure functions that transformed the input data into the required format. This method ensured that my functions were predictable and easier to test. By using functions that didn’t rely on external state, I reduced the chances of introducing bugs, which was important in a fast-paced environment. This experience showed me how functional programming can simplify coding tasks and improve reliability.

In my first job as a junior developer, I worked on a web application where we used both OOP and FP principles. The backend was structured using OOP, allowing us to define complex user roles and permissions as objects. In contrast, I utilized functional programming techniques for data processing tasks, as they allowed for better handling of asynchronous operations. This dual approach not only made the codebase more flexible but also taught me the importance of knowing when to apply each paradigm effectively, depending on the project needs.