Reversable

Reversable is an esoteric programming language created by User:Dulph on April 1st, 2026. It is extremely similar to REVERSE and most of the commands are the same. However, it doesn't support floating point numbers. It was used as a base for 2D-Reversable and 2D-Reversable 2.

Syntax

Commands

All instructions should be on the same line, separated by a unique space. Program ends itself upon reaching end of the line in one direction or the other.

Instruction	Desc
NOP	Does nothing
SKIP	Skips next instruction
REVERSE	Reverses the read direction
REVERSE<IA	Reverses the read direction if IA > 0 (IA being of type integer)
REVERSE<SA	Reverses the read direction if SA is not an empty string (SA being of type empty string)
GET-PX	Asks for input and stores it in var PX as P type
OUT-PX	Prints the value of var PX
IA+IB	Sets IA to IA + IB
IA-IB	Sets IA to IA - IB
IA*IB	Sets IA to IA * IB
IA%IB	Sets IA to the remainder of IA divided by IB

Variable types

Only 2 variable types are supported by Reversable :

• Integers, named with prefix I
• Caracters, named with prefix S

Examples

Cat

 SKIP REVERSE GET-SA SKIP OUT-SA REVERSE<SA

Implementations

• Python Implementation : Original implementation by User:Dulph