API - Application Programming Interface

The API is a term I have seen and heard a million times throughout my travels into the world of computer science and I always had a vague idea of its definition. I understood it mostly to be a kind of go-between for the user and a specific type of program.

 Turns out I wasn't too far from the truth, an article I was recently reading summarised what the API is really well so I thought I'd share it with you.

 Essentially the API is a set of pre-defined rules that programmers have to follow if they want their code to work on a certain application. For instance if you were on the web and you wanted to view a PDF file, you would have to have a 'plugin' that allows you to read PDFs within that browser. The programmer constructing that plugin however would of had to adhere to the rules set by that browser's API to create that functioning plugin.

 APIs are literally everywhere, if you're using Windows right now you may notice how, in all the menus and boxes that come up the style of these interfaces are pretty much the same and that is due to the fact that Windows itself has a general API and again programmers wanting to create programs within windows will have to adhere to the pre-defined rules of that API, making all programs developed under that API have a similar feel.

 So the next time you are considering writing code make sure you are aware of the API for the particular system you are trying to manipulate.