REST APIs: What, Why, and How
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What is a REST API?
REST (Representational State Transfer) is an architectural style used for building web services. A REST API (Application Programming Interface) allows different software systems to communicate over the internet using standard HTTP methods (like GET, POST, PUT, DELETE).
It's like a waiter in a restaurant—you (the client) place an order (request), and the waiter (API) brings you your food (response) from the kitchen (server).
đź’ˇ Why Use REST APIs?
Platform Independent
REST APIs work across devices, browsers, and operating systems.
Scalable & Flexible
Easily handle many users and can be used by web, mobile, or desktop apps.
Easy to Use
Uses simple HTTP requests. No special software required.
Faster Development
Frontend and backend teams can work independently.
Stateless Communication
Each request contains all necessary info—no need to remember past interactions.
⚙️ How Does a REST API Work?
REST APIs use HTTP methods to perform actions on resources (data objects):
Method Purpose Example
GET Retrieve data Get a list of users
POST Create new data Add a new product
PUT Update existing data Update a user's details
DELETE Remove data Delete a user account
Endpoint (URL): The address where the API is accessed, e.g., https://api.example.com/users
Request & Response: Sent in JSON or XML format for consistency and readability.
✅ Example:
To get all products:
http
Copy
Edit
GET https://api.shop.com/products
To add a new product:
http
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POST https://api.shop.com/products
Body:
{
"name": "Smartphone",
"price": 499
}
Read more:
What is Version Control? Simple Explanation
Introduction to Git and GitHub
How the Web Works: A Developer’s Perspective
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