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

Copy

Edit

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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  3. Great article! Your explanation of REST APIs—what they are, why they matter, and how they work—is very clear and beginner-friendly. The examples make the concepts easy to understand, especially for those starting their backend or API development journey. Looking forward to more insightful posts like this! , I'm currently learning full-stack development at Shikshaa Simple Learn, and this blog explains many of the concepts in a very simple way. Really helpful

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