Unfunge

Not to be confused with Unefunge.

Unfunge is an esolang by User:JIT, 2025

"I wonder what's the smallest subset of Befunge that's still Turing complete"

-User:JIT, 2025

Cmd	Description
+	Addition: Pop two values a and b, then push the result of a+b
!	Logical NOT: Pop a value. If the value is zero, push 1; otherwise, push zero.
`	Greater than: Pop two values a and b, then push 1 if b>a, otherwise zero.
_	Horizontal IF: pop a value; set direction to right if value=0, set to left otherwise
|	Vertical IF: pop a value; set direction to down if value=0, set to up otherwise
:	Duplicate top stack value
#	Bridge: jump over next command in the current direction of the current PC
g	A "get" call (a way to retrieve data in storage). Pop two values y and x, then push the ASCII value of the character at that position in the program. If (x,y) is out of bounds, push 0
p	A "put" call (a way to store a value for later use). Pop three values y, x and v, then change the character at the position (x,y) in the program to the character with ASCII value v
&	Get integer from user and push it
@	End program

you can try and delete some more commands

nor gate*

&#:!!:#!_|+
         :
         :
         _&!!&!!+!p@

Cat program*

&|    _:|
 :    !
 !    :
:_&!!:|_!
 :    :
      _:_&p@

better Cat program*

&#!_:::|:::
:&p@   _