2B

2B is an esoteric programming language created by user:David.werecat in which memory is stored in a tape where each cell is a separate tape of bytes.

Instructions

During these examples, the character " represents any number from 0-9 and the character _ represents a string of any length. Whenever 0 is used, it is interpreted as 10.

Instruction	Description
0	Zeros the current cell. This function also clears the overflow flag.
{	If the current cell is zero, jump to the matching }.
}	Do nothing. A placeholder for the { instruction.
(	Read a byte from input and place in the current cell.
)	Write the current cell's value to the console.
x	Stores the value of the current cell in a temporary register.
o	Writes the value in the temporary register to the current cell.
!	Performs a carry operation. If the last addition overflowed, then increment the current cell by one. If the last subtraction underflowed, the decrement the current cell by one.
?	Performs a binary NOT on the current cell.
+"	Adds an amount to the current cell.
-"	Subtracts an amount from the current cell.
^"	Moves the subtape up a number of times.
v"	Moves the subtape down a number of times.
<"	Moves the tape left a number of times.
>"	Moves the tape right a number of times.
:_:	Defines a label with name _.
*_*	Jumps to a label of name _. If the label is not within the current function, then the behavior of the jump is undefined.
@_@	Calls a function of name _.
~_~	Defines a function of name _. The function is treated as a separate chunk of code, so functions can be defined anywhere.
%	Ends a function definition.
#_#	Is a comment.

Spaces are treated as NOPs. Any tabs or newlines are interpreted as whitespace and removed before interpreting.

External resources

• Visual Basic .NET interpreter and sample programs