What is the API and how it works? - With Examples From Life-

What is the API and how it works? - With Examples From Life-

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What is API? It's actually a million-dollar question because users who understand the potential of APIs have the ability to make millions of dollars. API is actually an acronym for Application Programming Interface. An API is a software agent that allows two applications to talk to each other. In other words, it is the messenger who requests your request to your provider and then sends you a response. The API defines application-independent functions that allow applications and definitions to change without compromising each other. Therefore, a good API facilitates program development.

On the programmer's side, developers often don't start from scratch when they start coding. APIs provide great convenience to developers because of the speed they provide during application development. Developers are much more productive because they have to write a lot of code from scratch, but every time they write a new program with an API, they don't have to reinvent the wheel. Provides speed and agility for developers thanks to the API abstraction principle. For example, if the infrastructure behind the API includes physical servers located in a data center, the service provider can easily switch to virtual servers running in the cloud.

How APIs Work

APIs operate highly on both mobile and web. They are responsible for almost everything we do and allow us to do things like order a pizza, book a hotel, vote on a song or download the software in just a few clicks. APIs run silently in the background, providing the interaction possibility we expect.

I want to give you two examples of real life so you can see the big picture. Here's how they might look in everyday life:

Imagine a waiter who takes care of you in a restaurant. You're a customer and you're sitting at the table with a menu to order. Another factor in the process is the restaurant's kitchen, the provider that will fulfill your order. You need a link to deliver your order to the kitchen, then a link to bring your food back to your table. Chef can't be your connection because he cooks in the kitchen. You need something to connect it to the customer who ordered the food and the chef who prepared it. The link you need here is Garson, or the API as we speak. The waiter takes your order, sends it to the kitchen, tells the kitchen what to do. Then, it transmits you the response from the kitchen.

The second example is about booking a hotel, you are looking for a hotel room from an online travel booking site. Using the site's online form, you choose the city you want to stay in, check-in and check-out dates, the number of guests and the number of rooms. Then you click the” search " button. As you know, the travel site collects information from many different hotels. When you click” search, " the site interacts with each hotel's API to find available rooms that meet the criteria you set. As you will notice, these processes take place in seconds. These operations can occur thanks to an API that runs back and forth between applications, databases, and devices and acts as a messenger.

Finally, types of APIs

There are many types of APIs. For example, you may have heard of Java APIs or interfaces that allow objects within classes to talk to each other in the Java programming language. In addition to Program-oriented APIs, there are Web APIs such as simple Object Access Protocol (SOAP),remote procedure call (RPC),and perhaps the most popular - at least the name-Representative State transfer (REST). There are 15,000 publicly available and programmable APIs and thousands of dedicated APIs that companies use to expand their internal and external capabilities.

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