Recursion in Python: An Introduction

Recursion in Python: An Introduction

In this tutorial, you'll learn about recursion in Python. You'll see what recursion is, how it works in Python, and under what circumstances you should use it. You'll finish by exploring several examples of problems that can be solved both recursively and non-recursively.

In this tutorial, you'll learn about recursion in Python. You'll see what recursion is, how it works in Python, and under what circumstances you should use it. You'll finish by exploring several examples of problems that can be solved both recursively and non-recursively.

If you’re familiar with  functions in Python, then you know that it’s quite common for one function to call another. In Python, it’s also possible for a function to call itself! A function that calls itself is said to be recursive, and the technique of employing a recursive function is called recursion.

It may seem peculiar for a function to call itself, but many types of programming problems are best expressed recursively. When you bump up against such a problem, recursion is an indispensable tool for you to have in your toolkit.

By the end of this tutorial, you’ll understand:

  • What it means for a function to call itself recursively
  • How the design of Python functions supports recursion
  • What factors to consider when choosing whether or not to solve a problem recursively
  • How to implement a recursive function in Python

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