Library in programing

[Atreyo Bhattacharjee]

What is a library in programming, why does it matter, and how is it used?

 

[manddy123]

To put it simply, it's a module or a collection of data, documentation, code, classes, etc...

How to use them deppends on the language you're currently writing.

In JAVA, for example, you must use the keyword import and after the name of the library you wish to use like:
import java.util.*