duh

duh is an experimental deterministic cell-based esolang created by User:~blu256 written just for fun.

Etymology

duh stands for "duh is an esolang (duh!)".

2D memory block of preconfigurable size plus one register (additional memory cell);
Wide character support;
Seeking to specific positions in instruction file via instructions;
Several flavours of directional/numeric goto statements instead of using functions/labels;
Value manipulation done entirely by incrementing/decrementing and performing binary left-shifts/right-shifts by one.

Type	Instruction	Description
Value	`+`	Increment cell value by 1
	`-`	Decrement cell value by 1
	`<`	Left-shift value by 1 position
	`>`	Right-shift value by 1 position
	`\`	Reset cell value to 0
	`*`	Replace value with random from 0 to current value
	`~`	Swap cell and register values.
Memory pointer	`(`	Previous memory cell
	`)`	Next memory cell
	`'`	Jump to cell 0
Seeking	`@`	Go to the position/instruction specified by cell value
	`^`	Seek forward by number of instructions specified by cell value
Jumping	`\|`	Just an instruction marker. Useful in conjunction with the following instructions.
	`_`	Jump to the first marker to the left
	`=`	Jump to the first marker to the right
	`$`	Jump to the n-th marker, according to cell value
Conditions	`&`	If cell value is 0, skip next instruction
	`’`	If cell value is 0, exit
I/O	`:`	Read one wide character from stdin and store in current cell
	`;`	Print current cell value as a character to stdout

Every other character must be ignored, so they can be used in comments or to add a hashbang (#!/usr/local/bin/duh).
In comments, prefer lower-case letters. Uppercase letters may be used for debugging functions (this is up to the interpreter).
Syntax may change. The main source of documentation is the official README file.