This is the ??? programming language. Have you ever been writing a play, essay, or other work of literature and thought to yourself, "Man, wouldn't it be great if I could embed a program in this using punctuation?" Well now you can.

??? is a trivial Brainfuck substitution, meaning that a trivial replacement of operators will result in an equivalent BF program. Unsurprisingly, this means that ??? works the same way as BF: It operates on an array of memory cells (also called the tape), each initially set to 0, and has a pointer initially pointing to the first memory cell. It also means that it's a Turing complete language.

There are only three distinctions between how BF and ??? work in practice:

• In ???, traveling left of the starting cell is a no-op.
• In BF, loops are constructed using [ and ]. ??? uses a single character for loop boundaries, namely ", with ' as a toggle between open and closed.
• When printing to STDOUT, ??? prints unprintable characters using their hex representations. Printable characters appear normally.

Initially, " begins a loop.

The creators of the language would like to extend a special thank you to Stack Exchange users aditsu, Doorknob, Reto Koradi, and Martin Ender for inspiration and suggesting improvements/fixes.