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  1. W3School
    https://www.w3schools.com › python › python_functions.asp

    Python Functions - W3Schools

    • Information can be passed into functions as arguments. Arguments are specified after the function name, inside the parentheses.You can add as many arguments as you want, just separate them with … See more

    Parameters Or a…

    The terms parameter and argumentcan be used for the same thing: information that are passed into a function.

    W3School
    Number of Arguments

    By default, a function must be called with the correct number of arguments. Meaning that if your function expects 2 arguments, you have to call the function with 2 arguments, not more, and not less.

    W3School
    Arbitrary Arguments, *args

    If you do not know how many arguments that will be passed into your function,add a *before the parameter name in the function definition. This way the function will receive a tupleof arguments, and can access the items accordingly:

    W3School
    Keyword Arguments

    You can also send arguments with the key = valuesyntax. This way the order of the arguments does not matter.

    W3School
    How to Define and Call a Function in Python - GeeksforGeeks
    In Python, defining and calling functions is simple and may greatly improve the readability and reusability of our code. In this article, we will explore How we can define and call a function.
    GeeksForGeeks · https://www.geeksforgeeks.or…
  1. 123

    In Python, functions are reusable blocks of code that perform a specific task. To call a function, you first need to define it using the def keyword and then call it by its name followed by parentheses.

    Example

    def greet():
    print("Hello, World!")

    # Calling the function
    greet()
    Copied!

    Defining and Calling Functions

    To define a function, use the def keyword followed by the function name and parentheses. Inside the parentheses, you can specify parameters if needed. The function body is indented.

    def add(a, b):
    return a + b

    # Calling the function with arguments
    result = add(3, 5)
    print(result) # Output: 8
    Copied!

    Nested Functions

    You can also define functions within other functions. To call a nested function, you need to call the outer function first.

    def outer_function():
    def inner_function():
    print("Inner Function")
    inner_function()

    # Calling the outer function
    outer_function()
    Copied!

    Important Considerations

    Feedback
  2. GeeksForGeeks
    https://www.geeksforgeeks.org › python › how-to-define...

    How to Define and Call a Function in Python

    Jul 23, 2025 · In Python, defining and calling functions is simple and may greatly improve the readability and reusability of our code. In this article, we will explore …

  3. FreeCodecamp
    https://www.freecodecamp.org › news › how-to-call-a...

    How to Call a Function in Python – Def Syntax Example

    Jul 20, 2022 · Learn how to define and call functions in Python with the def keyword and parentheses. See how to call nested functions and avoid common mistakes.

  4. Python Guides
    https://pythonguides.com › call-a-function-in-python

    How To Call A Function In Python?

    Feb 10, 2025 · In this tutorial, I will explain how to call a function in Python. As a Python programmer, while using functions as a part of the project, it is important to learn how to call a function.

  5. PyTutorial
    https://pytutorial.com › how-to-call-a-function-in-python

    How to Call a Function in Python - PyTutorial

    Feb 4, 2026 · Learn how to call functions in Python with clear examples. This guide covers basic calls, arguments, return values, and common practices for beginners.

  7. Tech2Geek
    https://www.tech2geek.net › how-to-call-functions-in...

    How to Call Functions in Python (Step-by-Step Guide)

    Aug 24, 2025 · In this guide, we’ll walk through all the ways you can call functions in Python, from the basics to advanced techniques—complete with examples and …

  8. coderivers.org
    https://coderivers.org › blog › function-calling-in-python

    Function Calling in Python: A Comprehensive Guide - CodeRivers

    Mar 30, 2025 · By calling functions, you can execute these tasks at different points in your program, promoting code modularity, readability, and maintainability. In this blog, we will explore the ins and …

  9. CodeGym
    https://codegym.cc › groups › posts › how-to-call-a...

    How to Call a Function in Python - codegym.cc

    Nov 14, 2024 · Python Functions are the building blocks of reusable and organized code. By the end of this article, you’ll know how to define functions, call them, use …

  10. DataCamp
    https://www.datacamp.com › tutorial › functions-python-tutorial

    Python Functions: How to Call & Write Functions - DataCamp

    Nov 22, 2024 · In this tutorial, you'll learn all about Python functions. Follow steps to learn how to write and call functions in Python. Find code examples today!

  11. Guru99
    https://www.guru99.com › functions-in-python.html

    How to Call a Function in Python (Example) - Guru99

    Aug 12, 2024 · Python provides you many inbuilt functions, but it also gives freedom to create your own functions. In this tutorial, learn about functions in Python and …

  12. Deep dive into Python Calling Functions

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