Varnand

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Varnand is an esoteric programming language created by User:DoggyDogWhirl. Its name is a combination of "var", an abbreviation of "variable", and "nand", as in the NAND operation.

The purpose of Varnand was to create a language where the only operation is the logical NAND. However, with only hexadecimal literals, it is impossible to create values above 15 (or below 240 if using an 8-bit NAND), making printing letters impossible, so there is also a rotation operation.

Commands

Varnand uses Polish notation. All commands return their value. Varnand does not have a way to loop, and thus is not Turing-complete.

Command Description
! _ _ Logical NAND
% _ _ Rotates first value left by second value of bits
O _ Outputs value as a number
P _ Prints character with given value
I Inputs one character
[0-9][A-F] Hexadecimal value 0-15
[a-z] All variables, initialized to 0
= _ _ Set variable (first argument) to value

All other symbols are considered comments (although "U" is the only vowel available).

Example programs

2

Outputs "2".

O2

Cat program

One-time cat program:

PI

Hello, world!

Uses (A NAND A) NAND (B NAND B) as logical OR.

P!!%44%44!88
P!!%64%64!55
=lPP!!%64%64!CC
=mP!!%64%64!FF
P!!%24%24!CC
P%24
P!!%74%74!77
Pm
P!!%74%74!22
Pl
P!!%64%64!44
P!!%24%24!11

Newlines are not necessary and do not affect code.

Adder

Adds the values of two inputted characters (mod 256), and outputs that value's character.

=xI=yI
=o0
=n!00
=c0
=a!n!1x=b!n!1y
=d!ab=e!!da!db
=f!ce=g!!fc!fe=o!!oo!gg
=h!df=c%h1
=a!n!2x=b!n!2y
=d!ab=e!!da!db
=f!ce=g!!fc!fe=o!!oo!gg
=h!df=c%h1
=a!n!4x=b!n!4y
=d!ab=e!!da!db
=f!ce=g!!fc!fe=o!!oo!gg
=h!df=c%h1
=a!n!8x=b!n!8y
=d!ab=e!!da!db
=f!ce=g!!fc!fe=o!!oo!gg
=h!df=c%h1
=a!n!%14x=b!n!%14y
=d!ab=e!!da!db
=f!ce=g!!fc!fe=o!!oo!gg
=h!df=c%h1
=a!n!%24x=b!n!%24y
=d!ab=e!!da!db
=f!ce=g!!fc!fe=o!!oo!gg
=h!df=c%h1
=a!n!%44x=b!n!%44y
=d!ab=e!!da!db
=f!ce=g!!fc!fe=o!!oo!gg
=h!df=c%h1
=a!n!%84x=b!n!%84y
=d!ab=e!!da!db
=f!ce=g!!fc!fe=o!!oo!gg
=h!df=c%h1
Po

Implementation

Implementation in Python