Befunge-93 is an esoteric programming language where the program exists in a two-dimensional grid of cells, where each cell contains a single instruction, and execution can proceed in any cardinal direction across this grid — not just left-to-right, but also right-to-left, top-to-bottom, and bottom-to-top.
v < >?"/",^ >"\",^
can simulate some push-down automata
Try it Online
- yoob (Applet) (Java applet)