Gridify

Gridify is an esolang by User:Cordership based on Befunge.

Instructions

Instruction	Definition
>	Move code pointer right.
<	Move code pointer left.
^	Move code pointer up.
v	Move code pointer down.
~	Input a character and push it into the stack.
&	Input an integer and push it into the stack.
.	Pop the number at the top of the stack, output it as an integer.
,	Pop the number at the top of the stack, output it as an ASCII character.
_	Horizontal If: Pop top of stack, go left if value=0, otherwise go right.
|	Vertical If: Pop top of stack, go up if value=0, otherwise go down.
`	Horizontal If 2: Pop top of stack, go right if value=0, otherwise go left.
x	Vertical If 2: Pop top of stack, go down if value=0, otherwise go up.
?	All-directions If: Pop top of stack, if value=1 go up, if value=2 go down, if value=3 go left, if value=4 go right.
[int]	Push number into the stack.
"[string]"	Push string into the stack.
@	Halt program.
:	Pop top of the stack at the code pointer and store it in the code pointer.
;	Push the code pointer's contents into the stack at the code pointer.
+	Pop the two topmost numbers a and b in the stack, push the result of a+b.
-	Pop the two topmost numbers a and b in the stack, push the result of a-b.
*	Pop the two topmost numbers a and b in the stack, push the result of a*b.
/	Pop the two topmost numbers a and b in the stack, push the result of a/b.
%	Pop the two topmost numbers a and b in the stack, push the remainder of the integer division a/b.
^	Pop the two topmost numbers a and b in the stack, push the result of a^b.
#	Discard the code pointer's contents.
\*text*\	One-line comment.
$	Pop top of the stack at the code pointer, duplicate it: one copy gets pushed back into the stack, the other goes into the code pointer.
w	Pop the code pointer's contents, duplicate it: one copy goes into the stack, the other stays in the code pointer.
s	Starts code execution.
k	Pop the two topmost numbers a and b in the stack, push a into the stack b times.
n	Pop all of the stack's contents and print them from top to bottom as integers.
r	Pop all of the stack's contents and print them from top to bottom as ASCII characters.
o	Increment the code pointer's contents by 1.
a	Duplicate top stack value.
p	Skip the command right ahead of the code pointer in its direction.
\	Swap top stack values.
z	Move the code pointer in a random direction.

1. Everything else is NOP.
2. If the pointer or the memory cell at the pointer is storing a string, the +, *, and ^ commands don't work.
3. The code execution starts at the leftmost input command or the s command then moves right by default.

Programs

Hello, World!

s"!dlroW ,olleH">  v
                ^!a`@

Hello, World! 2

s72!101!108!108!111!44!32!87!111!114!108!100!33!@

Hello, World! 3

s"!dlroW ,olleH"r@

One time cat

,.

Cat program

,>.,v
 ^  _@

Truth-machine

This one infinitely prints every user input except 0.

 >0.@
,|
 >.,v
 ^  <

A+B problem

&&+.

Looping counter

s42 0:>owkr10,v
      ^       <