Home » Chapter 6 : Functions
Function Concepts
Functions in Python, as in most programming languages, are self-contained modules of code that perform a specific task. These blocks of code are designed to be reusable, making programs more modular, efficient, and manageable. A function typically takes inputs (known as arguments or parameters), performs some operations on these inputs, and then returns a result (known as a return value).
Python comes with a large standard library that includes many built-in functions. These are functions that are always available for use without the need to import any additional modules. These functions are designed to provide basic functionality that is commonly needed in Python programs. The following page provides an introduction to built-in functions in Python.
In addition to the the standard library functions, Python allows programmers to define their own functions. These programmer-defined functions are created to perform specific tasks that might not be covered by the standard library. This is where the real power of functions becomes evident, as they can be tailored to the exact needs of the program. Programmer-defined functions are covered in detail later in this chapter.
