O is a esoteric programming language used for
CodeGolf. It was inspired by
languages such as GolfScript, Pyth, K, and ><>, but it has grown into
its own language with many cool features. The current interpreter is
written in C. You can find the old Java interpreter on the
java-interpreter
branch.
All documentation for the language is on ReadTheDocs. You can try the language out online at Heroku.
Examples
Here are some examples of O.