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  1. Python Functions - W3Schools

    Creating a Function In Python, a function is defined using the def keyword, followed by a function name and parentheses:

  2. How To Define A Function In Python?

    Feb 10, 2025 · To define a function in Python, you use the def keyword followed by the function name and parentheses. Inside the parentheses, you can specify parameters that the function …

  3. Python def Keyword - GeeksforGeeks

    Jul 23, 2025 · Python def keyword is used to define a function, it is placed before a function name that is provided by the user to create a user-defined function. In Python, a function is a logical …

  4. Python Functions (With Examples) - Programiz

    A function is a block of code that performs a specific task. In this tutorial, we will learn about the Python function and function expressions with the help of examples.

  5. def | Python Keywords – Real Python

    In Python, the def keyword defines a function, which is a reusable block of code that can accept data input, perform a specific computation or task, and return a result or produce a side effect. …

  6. Python Function: The Basics Of Code Reuse

    Oct 19, 2025 · Functions are the real building blocks of any programming language. We define a Python function with the def keyword. But before we start doing so, let’s first go over the …

  7. How to define a function in Python - Pluralsight

    Nov 30, 2025 · A guide on how to create and use a function in Python, so you can avoid copy-pasting your code, using a simple library management system as an example.

  8. Python's `def` Function: A Comprehensive Guide - CodeRivers

    Apr 21, 2025 · In Python, the def keyword is used to define functions. Functions are a fundamental building block in programming as they allow you to group a set of statements …

  9. Python Functions: A Beginner’s Guide to `def` and Function Calls

    Functions are one of the most essential building blocks in Python programming. Whether you are writing a small script or building a large-scale application, functions help you organize, reuse, …

  10. How to Define a Function in Python - All Things How

    Aug 23, 2025 · Use the def keyword to declare a function, add parameters in parentheses, end the header with a colon, and indent the body.