The #12in23 Challenge

Expand your horizons by trying out 12 different programming languages in 2023.

Go old-school with COBOL, cutting edge with Unison or esoteric with Prolog. Explore low-level code with Assembly, expressions with a Lisp or functional with Haskell! This month is Slimline September. Join the Challenge to learn more!

Expand your knowledge. Have fun. Join the community. 100% free.

Why take part?

Expand your knowledge

Learning new languages is a great way to explore different paradigms, concepts and ideas. Learning different ways to solve problems is a guaranteed way to make you a better developer.

Learn together

The Challenge is a great way of connecting with other developers. Chat to others on our forums, watch streamers on YouTube or Twitch, or bounce solutions on social media.

Have fun!

Coding should be fun! When we get stuck in the same patterns every day it can feel monotonous and boring. Solving challenges in different languages is a great way to reignite your spark.