This course acts as a stepping stone to becoming a Python master. Before getting into advanced concepts like classes and functions, the course begins with Python's basic concepts, such as keywords and data types. Later in this course, you'll be going through 50 code puzzles that will teach you different concepts in Python 3.

An Intro to Python 3

## Puzzle 19

**What is the output of the following code?**

> **Note**: Enter the output you guessed. Then, press the **Run** button, and your new Elo will be calculated. Don't forget to save your Elo rating.
 

# Puzzle 19

**What is the output of the following code?**

> **Note**: Enter the output you guessed. Then, press the **Run** button, and your new Elo will be calculated. Don't forget to save your Elo rating.
 

Understand the concept of slicing, concatenation, arbitrary arguments, and indirect recursion in Python.

Introduction

A Quick Overview of the Python Language

Fifty Code Puzzles

The Final Remarks

Puzzles 19 to 22

Puzzle 19