What is an API? Application Programming Interface

In computer programming, an application programming interface (API) is a set of subroutine definitions, protocols, and tools for building software and applications. A good API makes it easier to develop a program by providing all the building blocks, which are then put together by the programmer. An API may be for a web-based system, operating system, database system, computer hardware, or software library. An API specification can take many forms, but often include specifications for routines, data structures, object classes, variables, or remote calls. POSIX, Microsoft Windows API, the C++ Standard Template Library, and Java APIs are examples of different forms of APIs. Documentation for the API is usually provided to facilitate usage. The status of APIs in intellectual property law is controversial.

Purpose:
Just as a graphical user interface makes it easier for people to use programs, application programming interfaces make it easier for developers to use certain technologies in building applications. By abstracting the underlying implementation and only exposing objects or actions the developer needs, an API reduces the cognitive load on a programmer. While a graphical interface for an email client might provide a user with a button that performs all the steps for fetching and highlighting new emails, an API for file input/output might give the developer a function that copies a file from one location to another without requiring that the developer understand the file system operations occurring behind the scenes.

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The PushYourRank Team
Posted By: Nicholas Coriano

About The Author: Nicholas Coriano is an Entrepreneur, Web Developer, Social Media Marketer, SEO Consultant and the founder of this blog and The NewYorkWebsiteDesignCenter.com.  While developing websites for his own businesses and marketing his entrepreneurial ventures online, he began blogging useful tips and "how-to" articles on PushYourRank.com for reference purposes.  To retain Nicholas for help with your website launch or product launch, email PushYourRank@Gmail.com

About PushYourRank.com: PushYourRank.com (the Blog) is a blog that helps small businesses, start-ups, developers, amateurs website builders, bloggers and entrepreneurs develop their websites, their social media presence, their search engine optimization techniques and more ....online.  The Blog publishes articles about Ecommerce, Email Marketing and How To Make Money Online...as well as any topic that pertains to the Internet or Online.  If you need help developing a website, SEO or Social Media outsourcing, see NewYorkWebsiteDesignCenter.com, if you would like to advertise or have us publish an article on a certain subject, please email us at PushYourRank@Gmail.com