Скачать или смотреть Creating a Checkerboard Pattern with Python

Learn how to create a checkerboard pattern using Python, fix common algorithm mistakes, and improve your coding skills.
---
This video is based on the question https://stackoverflow.com/q/72195022/ asked by the user 'Qulymzhanov Nursat' ( https://stackoverflow.com/u/15100885/ ) and on the answer https://stackoverflow.com/a/72195131/ provided by the user 'BeRT2me' ( https://stackoverflow.com/u/11865956/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Checkerboard with python

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Introduction

Creating a checkerboard pattern in Python can be an exciting task, especially for those who are just starting to learn programming. However, sometimes the implementation can be tricky, as even small mistakes can lead to incorrect outputs. In this guide, we will explore a common problem faced when creating a checkerboard pattern using the '*' symbol and how to properly implement the solution.

The Problem

You may find yourself in a situation like this: You were tasked with generating a checkerboard made up of '*' characters but ran into some issues with your algorithm. Your initial code might look something like this:

[[See Video to Reveal this Text or Code Snippet]]

While the intention here is clear, the output may not come out as expected. This leads us to wonder: how can we fix the algorithm to achieve the desired checkerboard output?

Understanding the Solution

Fortunately, there is a simpler way to implement a checkerboard pattern in Python. Let's break down the solution step-by-step.

Step 1: Setting Up Your Variables

Start by defining how large you want your checkerboard to be. The variable n will determine the size (both width and height) of the checkerboard:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Using a Simple Loop

Instead of using a complex array to store the patterns, we can print directly while iterating through the rows. Here’s how we can achieve this with a simple loop:

We can use a string that contains the desired characters.

We’ll alternate between two rows: one filled with '' and another with a space followed by ''.

Here’s the complete code:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: How the Code Works

Explanation of the Code

x = '* ' defines what our pattern will look like.

y = 1 is used to alternate between printing the starting character as '*' or a space.

The loop for i in range(2*n) ensures we cover twice the number of rows, effectively creating the checkerboard pattern.

print(x[::y] * n) prints the string repeated n times, where x[::y] chooses which row to print based on the value of y.

y *= -1 toggles between 1 and -1, alternating the rows.

Example Output

For an input of n == 4, the output will look like this:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

Creating a checkerboard pattern using Python doesn't have to be complicated. By following the simple steps outlined above, you can successfully generate your own pattern. Practice modifying the size of the checkerboard and explore how the code works to reinforce your learning. Happy coding!