About the Challenge Projects category

Welcome to the Challenge Projects category and congratulations on completing a project!

This is a safe space for you to ask questions about any sample solution code and share your work with others! Feedback is a vital component in getting better with coding and all ability levels are welcome here, so don’t be shy!

Remember - your solution might not look like ours, and that’s totally okay! There are multiple ways to complete these projects and you should exercise your creative abilities in doing so. Feel free to ask questions about different methods.

This is a supportive and kind community of people learning and developing their skills. All comments here are expected to keep to our community guidelines

Best practices for asking questions about the sample solution

  • Be specific! Reference exact line numbers and syntax so others are able to identify the area of the code you have questions about.

How do I share my own solutions?

  • If you completed the project off-platform, you can upload your project to your own GitHub and share the public link on the relevant project topic.
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In both cases, you’ll need to get set-up on GitHub! This is a great opportunity to get your feet wet using a critical development tool. Not sure how to get started? We’ve got you covered - read this article for the easiest way to get set-up on GitHub.

World Population II Challenge Project for Feedback

WORLD POPULATION Challenge Project for peer Feedback:

Hi, i have completed the swift challenge project “Make a Mixtape 101”
I would appreciate if you can give feedback :slight_smile:
This is my version of the “side A & B” part of the project. Not sure to post in the right place, sorry if not


This is regarding ‘’’ Coded Correspondence Project ‘’’ , Please elaborate how exactly the below code is working?

How offset of 10 is performed? : ‘’’ alphabet[(alphabet_value + 10) % 26]’’’ ??

alphabet = 'abcdefghijklmnopqrstuvwxyz'
msg = "xuo jxuhu! jxyi yi qd unqcfbu ev q squiqh syfxuh. muhu oek qrbu je tusetu yj? y xefu ie! iudt cu q cuiiqwu rqsa myjx jxu iqcu evviuj!" 
#msg = ' ? ,'
punctuation = "?'!., "
new_msg = ''

for letter in msg :
    if letter not in punctuation:
        alphabet_value = alphabet.find(letter)
        new_msg += alphabet[(alphabet_value + 10) % 26]
        new_msg += letter

Thanks in advance.


I’ve already finished the Number Guesser Challenge, but I’d like to do it again to try and find another way to do it. Where is that challenge available?


Hi, please add more challenges or projects with much fewer instructions to fully mastered what we just learned. Thank you