# Brainstuck

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Brainstuck is a variation of Brainfuck, with a stack instead of a tape. The commands are:

- "+" increments the top value of the stack.
- "-" decrements the top value of the stack.
- "." pops the top value of the stack, and outputs it.
- "," pushes a byte from stdin onto the stack.
- "0" pushes 0 onto the stack
- ":" pops the top value of the stack, and pushes the value at a depth of that depth into the stack onto the stack.
- "[" pops the top value of the stack, and if that value is 0, jumps to the opcode after the corresponding "]"
- "]" jumps to the corresponding "["

## Examples

Echo:

0+[,0:.+]

## Forth codes

It is possible to convert into Forth codes by:

+ 1+ 255 AND - 1- 255 AND 0 0 : PICK , KEY . EMIT [ BEGIN WHILE ] REPEAT

Some other commands in Forth can be also using the Brainstuck codes:

DUP 0: OVER 0+: THEN 0] 0 * 0:[-0:] DROP [0:[-0:]]