Gain insights into Python 3 by learning basic concepts like keywords and data types, and delving into 50 code puzzles that enhance your understanding of classes and functions.

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 4

**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.

#############################
## id 313
## Puzzle Elo 691
## Correctly solved 78 %
#############################

# This is a comment
answer = 42  # the answer
# Now back to the puzzle
text = "# Is this a comment?"
print(text)


<br>

## Comments

There are two types of comments:
* **Block comments**:

  Block comments are indented to the same level as the commented code.
* **Inline comments**:

  Inline comments are separated by at least two spaces on the same line as the commented code.
<br>

The Python standard recommends writing comments as complete sentences. Moreover, the standard discourages using inline comments because they are often unnecessary and clutter the code. Write short and concise code, and do not overuse comments.

This puzzle introduces two basic concepts:

* First, variables can hold strings. In fact, variables can hold any data type. The data type of a variable can change. You can assign a string to a variable, which is followed by an integer.  

* Second, comments in the code start with the hash character (`#`) and end with the start of the next line.


> The interpreter determines the data type of a variable at runtime.

The small twist in this puzzle is the question of whether the hash character within the string literal starts a new comment. This is not the case; a comment cannot appear within a string.

According to the standard, the comment on *line 8* ("`# the answer`") in the puzzle is considered a bad style. 

Understand the difference between comments and strings. Learn the concepts of indexing and string concatenation in Python. 

Fifty Code Puzzles: 4 to 6

Understand the difference between comments and strings. Learn the concepts of indexing and string concatenation in Python.

Introduction

A Quick Overview of the Python Language

Fifty Code Puzzles

The Final Remarks

Puzzles 4 to 6

Puzzle 4

Comments