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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 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.

  4. 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 …

  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. An Essential Guide to Python Functions By Examples

    In this tutorial, you'll learn to define custom Python functions so that you can reuse them in the program.

  7. Python Function: The Basics Of Code Reuse

    Oct 19, 2025 · Learn how to create and use a Python function with Python's def keyword, why functions are useful, and learn about variable scope.

  8. Python Function Definitions: A Comprehensive Guide

    Apr 22, 2025 · A function in Python is a reusable block of code that performs a specific task. It can take input (arguments), perform some operations on that input, and return an output (although …

  9. How to Define and Use Functions in Python: A Complete …

    Aug 24, 2025 · In this tutorial, we’ll cover everything you need to know about defining and calling functions in Python. From the basics of def and parameters to advanced features like *args, …

  10. Python Functions [Complete Guide] – PYnative

    Jan 26, 2025 · Use the def keyword with the function name to define a function. Next, pass the number of parameters as per your requirement. (Optional). Next, define the function body with …