[0]

Libraries in programming languages are collections of prewritten code that

users can use to optimize tasks.

​

[1]

In computer science, a library is a collection of non-volatile resources used

by computer programs, often for software development. These may include

configuration data, documentation, help data, message templates, pre-written 

code and subroutines, classes, values or type specifications.

​

[2]

In very simple terms a library is a file that consists of some useful code.

​

This code could be a simple function or a collection of functions, variables,

classes, data structures. Generally a library is a code that will allow you to

interact with a particular aspect of the OS. e.g. libraries like stdio.h

A library could also be a collecction of mathematical or logical operations.

e.g. math.h

The general philosophy behind writing a library is to

Allow for code reuse

Provide access of some aspects of hardware/software.

​

​