JusticeTech System

You can convert it to a note and sell if necessary

I think with these i have been able to teach you what you won't see on any book or internet

Although APIs and libraries are related, they are not the same. Main Difference API An API allows different software applications to communicate. It acts like a messenger. Example: Your weather app asks a weather server for today's forecast. Library A library provides ready-made code that runs inside your own application. It acts like a toolbox. Example: Your program uses Python's math library to calculate square roots.

There are 2 types of libraries 1. Standard Library Comes with the programming language. 2. Third-Party Library Created by other developers. Examples: requests pandas numpy Flask Django Etc

HOW LIBRARIES WORK A library works by providing ready-made functions, classes, or modules that your program can use. Instead of creating every feature yourself, you simply import the library and use what you need.

Real-Life Example: School Library A school library contains thousands of books, when you need information about Biology, you don't write a new Biology textbook instead you borrow an existing one. Programming libraries work in exactly the same way. Instead of writing code from the beginning, developers borrow code that has already been tested.

Imagine you are building a house, would you make your own: Bricks? Cement? Glass? Roofing sheets? No. You buy these ready-made so you can focus on building the house. Programming works the same way. Instead of writing code for: Mathematical calculations Sending emails Drawing graphs Connecting to the internet Developers use libraries that already contain this code.

What is a Library? A Library is a collection of pre-written code that programmers can reuse in their own programs instead of writing everything from scratch. Think of it as a toolbox filled with ready-made tools. Whenever you need a tool, you simply take it from the toolbox instead of making a new one. Simple Definition A library is a collection of reusable code that helps programmers perform tasks more quickly and efficiently.

Final Summary An API is a bridge that allows different software applications to communicate safely and efficiently. Without APIs, modern apps would not be able to share data, authenticate users, process payments, display maps, or provide many of the online services we use every day.

5. Body The body contains the main information being sent. For example, when creating an account: Name Email Password These details are sent in the request body.

4. Headers Headers contain extra information. Examples: Authentication token Language preference Content type Think of headers as an ID card that identifies who is making the request.

3. Parameters Parameters allow us to request specific information. Example: https://justicetech.space?city=Lagos Here: Parameter = city Value = Lagos

2. URL or Base Url A URL tells the browser or app where to find a resource. Example: https://api.justicetech.space/users

Just as every house has an address, every API has an endpoint.

1. Endpoint An endpoint is the address where an API can be reached. Example: https://api.justicetech.space/current

There are 5 components that made up an api

COMPONENTS OF AN API.....

I hope you are all following

Another Example: WhatsApp You type: Hello Your phone sends the message to the WhatsApp server through its API. The server stores it and delivers it to your friend's phone. All this usually happens in less than a second.

Client (Phone/App) ▼ Request ▼ API ▼ Server ▼ Response ▼ Client Displays Result