What's an API?

Think of an API as a waiter in a restaurant. You, as a customer, tell the waiter what you want (like ordering food), and the waiter goes to the kitchen (the server) to get it for you. In tech terms, an API allows different software programs to communicate and share information with each other, just like how you communicate your order to a waiter.

What's "RESTful"?

RESTful is just a way of organizing these APIs to make them easy to understand and use. It's like following a recipe to make sure everyone cooks the same dish the same way.

Why "RESTful"?

Well, it's called "RESTful" because it follows some simple rules (or principles) called REST. Think of REST as a set of guidelines for building APIs that help them work smoothly and efficiently.

What are the main rules of RESTful APIs?

Separation:

Imagine you and your friend are talking. You both understand each other, even though you might speak different languages. In the same way, RESTful APIs separate the different parts of communication, so both the sender (client) and receiver (server) can understand each other even if they're using different technologies.

Everything is a Resource:

In a library, books are resources. In a RESTful API, anything you want to work with (like data or functions) is treated like a resource. Each resource has its own unique address, like the unique location of each book in the library.
Simple Actions: Just like in a video game, you have simple actions like move, jump, or attack. In RESTful APIs, you have simple actions too, like reading (GET), creating (POST), updating (PUT), or deleting (DELETE) resources.

No Memory:

Imagine a waiter serving different customers every day. They don't remember what each customer ordered yesterday. Similarly, RESTful APIs don't remember past interactions. Every request from a client must contain all the information needed for the server to respond correctly.

Clear Communication:

Just like when you're talking to someone and want them to understand you clearly, RESTful APIs communicate in a clear and consistent way using standard protocols and formats.

Easy Navigation:

If you're reading a book and it mentions another book you might be interested in, it's easy to find it. In RESTful APIs, it's easy to navigate between different parts (or resources) using links provided in the responses.

In simple terms, RESTful APIs are like a friendly waiter (API) in a restaurant (server) following a recipe (REST principles) to make sure everyone gets their order (requests) right and understands each other clearly.