Inside the function, we can not only write loops, declare variables, use `if-else` statements but also call other functions. Let's look at an example.

def function_1(): # Outer function
    print('I am an outer function')
    def function_2(): # Inner function
        print('I am an inner function ')
    function_2()

function_1()

Thanks to this course, you will learn what functions are, how to create them correctly in python. Start your course with introductory exercises, a structure for creating functions, and basic examples. in the end, you will learn what recursion is, how recursive functions are implemented in python, and you will also learn how to create more complex functions that, in your further practice, will greatly simplify and optimize your code.

Functions are one of the most important components of any programming language. Here we will learn how to create simple functions and see how use them to simplify the code

Parameters and arguments are a piece of information that is passed to a function. Here we will learn how to work with them.

In this section, we will learn what default parameters are and what they are used for. We will also learn how to create functions with them.

What if we don't know exactly how many arguments we will send? Here we will learn how to fix this problem.

Here we will learn how to create functions that are defined inside another function, and they are called inner or nested functions.

Recursion is a general mathematical and programming concept. Here we will learn how to implement recursive functions.

Functions within Functions

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