INCAL

INCAL is an esoteric programming language by (presumably) User:Zzo38.

Operators

#	Number
<	Copy: Copies previous operand
>	Destroy: Destroys previous operand
-	Variable: Get the value of a variable
@	Centrifuge
*	CellularAutomaton
_	Store
?	Skip
;	String
^	Recall
!	Array
$	Swap
`	UnArray
%	Execute
+	Combine: Combines 2 8-bit values to a 16-bit value
[	BeginLoop
]	EndLoop

Commands

send	Send to output
receive	Receive from input
store	Store value in a variable
call	Call a subroutine
return	Return from a subroutine call
record	Start recording changes of variables
stop	Stop recording
rewind	Rewind recording and put variables recorded to old values
accept	Accept new values of variables and remove old value from recording
forget	Discard entries from call stack
echo	Echo a normalized form of a value to output
die	Stop program
string	Create string for using with $ operator
erase	Erase a recording
object	Create object
enter	Enter an object code
exit	Exit from an object code
bits	Tell the bits of a number to the output
edit	Self-modifying code

Examples

Hello World example:

send,66#111#102#<101#42#93#101#120#102#110#43#
die

Replace q with the value to check:

68#q<@* = Return 1 if non-zero, or 0 if is zero
51#q* = Bit-wise not of q
240#q* = Half value of q
170#q* = Double value of q
102#q* = Intercal XOR operator
136#q* = Intercal AND operator
238#q* = Intercal OR operator

Interleave bits of 2 8-bit values (replace X and Y with the operands):

24575#10239#4607#2175#1055#519#257#XY+@@@@@@@

External resources

• Download file (dead link)