developer-roadmap/roadmaps/python/content/functions-builtin-functions@-DJgS6l2qngfwurExlmmT.md

Functions

In programming, a function is a reusable block of code that executes a certain functionality when it is called. Functions are integral parts of every programming language because they help make your code more modular and reusable. In Python, we define a function with the def keyword, then write the function identifier (name) followed by parentheses and a colon.

Visit the following resources to learn more:

• @official@Built-in Functions in Python
• @article@Defining Python Functions
• @article@How to Return Multiple Values in Python (and When to Use Each Method)
• @article@Master Python Filter: Syntax, Examples, and Best Practices
• @article@Python reduce(): The Complete Guide (With Examples)