Understanding What an API Is
An API, or Application Programming Interface, is a tool that allows different software systems to communicate. It lets one app request information or actions from another.
How an API Works
When an app needs data—like weather info, login access, or payment processing—it sends a request to an API. The API returns the exact information the app needs.
Real Examples of APIs
Using “Login with Google,” checking maps inside another app, showing live weather, or processing payments with PayPal—all these actions depend on APIs.
Why APIs Matter
APIs allow apps to connect, share data, and work together. Without them, every app would need to build everything from scratch, making development slow and inefficient.
Types of APIs
Common types include web APIs, open APIs, private APIs, and partner APIs. Each one controls who can access the data and how it is used.
The Simple Takeaway
An API is a digital bridge that allows apps to talk to each other. It makes modern software fast, connected, and able to share information easily.