XtremeMusicStudios Official This question can be answered by anyone. Doesn't necessarily have to be a mod.
Code Playground is a place where you can run and save codes in the various supported languages.
The playground lets you create programs and run them. For examples, see all of the codes created by others. Web code can play with graphics. The other languages are limited to console input and output.
It's for playing with code i.e. trying things out to check your understanding of the language concepts and demonstrating language features to others. There are a number of restrictions and limitations due to it being a sandboxed environment though.
The code that is placed in new codes is just example code for you to modify or replace as you see fit.
