Functions and Recursive Functions in Python Tutorial | Python for Beginners | MLittleProgramming

Functions and Recursive Functions in Python Tutorial

Python Functions are at the core of Software Development. Python Functions are a building block to learning Python for Beginners. Python Functions allow us to call a block of Python code repeatedly. We can define Parameters for our Python Functions. We can pass Arguments into our Python Functions. We can change the order we pass Arguments or Parameters into our Python Functions by using keyword arguments or arbitrary arguments. These are sometimes called kwargs or args. We can create Return Statements that Return data from our Python Functions. Python Functions can be used to manipulate data.

Recursion in computer science is a method of solving a problem where the solution depends on solutions to smaller instances of the same problem. Simply put Recursion is a function that calls itself.

Recursive Functions have some requirements, often referred to as the three laws of Recursion:
Recursive Functions must have a base case.
A Recursive Function must change its state.
A Recursive Function must call itself.

Many algorithms can be expressed more elegantly using a Recursive Function.
Recursive Functions can also reduce the time complexity of an algorithm.

In this video we will look at:
How to define a Python Function
How to pass Arguments into a Python Function
How to define Parameters for a Python Function
How write a Return Statement for a Python Function
The difference between Arguments and Parameters
Python Function Arguments vs Parameters
How to define a Python Function with multiple Parameters
Syntax rules in Python Function definitions
Python Function Arbitrary Arguments
Python Function Keyword Arguments
Python Function Arbitrary Keyword Arguments
What a Recursive Function is
Recursive Function syntax
How to replace loops with Recursive Functions
How to write a single Recursive Function
How to write an auxiliary Recursive Function

We will be looking at Python Functions: Arguments, Parameters and Return Statements in Python in PyCharm.

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