An API, or Application Programming Interface, is a way for two or more computer programs to communicate with each other. It is a type of software interface that offers a service to other pieces of software. APIs are mechanisms that enable two software components to communicate with each other using a set of definitions and protocols. The term "API" has been generically used to describe connectivity interfaces to an application, but modern APIs have taken on some unique characteristics that have truly transformed the technology space. APIs are all around us, and we use them every time we use a rideshare app, send a mobile payment, or change the thermostat temperature from our phone.
APIs are used to integrate new applications with existing software systems, which increases development speed because each functionality doesnt have to be written from scratch. APIs can be used to leverage existing code. They are also used for innovation, as entire industries can change with the arrival of a new app, and businesses need to respond quickly and support the rapid changes.
In simpler terms, an API is like a waiter in a restaurant who listens to your order request, goes to the chef, takes the food items ordered, and gets back to you with the order. It is a collection of communication protocols and subroutines used by various programs to communicate between them. A programmer can make use of various API tools to make their program easier and simpler, and an API facilitates programmers with an efficient way to develop their software programs.
