The basic syntax of a Python function is quite simple. Consider this: Let’s start with the usual Hello, World function. We’ll call the function helloWorld (). To create a function, you must use the def keyword, which declares a function. So, the first line of our helloWorld function would be:

These are known as user-defined functions. To define a function in Python, you use the def keyword, followed by the function name and an optional list of parameters enclosed in a required pair of parentheses. You can call and reuse a function by using its name, a pair of parentheses, and the necessary arguments.

In Python, a function is defined using the def keyword, followed by a function name and parentheses: This creates a function named my_function that prints "Hello from a function" when called. The code inside the function must be indented. Python uses indentation to define code blocks. To call a function, write its name followed by parentheses:

You’ve learned about Python functions, which are essential for creating reusable and modular code. You’ve learned how to define functions using the def keyword, call them with appropriate arguments, and return values to the calling environment.