It Is Not What It Is

It Is Not What It Is is a joke language created by User:LEOMOK. It takes inspiration from a lot of ideas and joke languages such as Turi and Bf19, as is his first joke language. Its speification is intentionally incomplete.
==Commands==
This language uses an infinite stack of integers and floats. Every command has a 0.0000001 chance of hanging up the system.
 0-9 push that number on the stack
 A-F push 10-15
 {12.3} push everything between the braces as a single (decimal) number
 #c push the ascii of c (for example)
 +-*/\ x, y -- x(op)y (\ is integer division). Dividing or modulo by zero would do something completely random.
 % x, y -- x mod y
 ^ x, y -- x**y
 < x, y -- x<y ? 1 : 0
 > x, y -- x>y ? 1 : 0
 wer pop x, push INTERCAL unary and, or and xor of x. This instruction is by its very definition obsolete.
 G be turing complete.
 _ pop and print top stack value
 @ pop top stack value, mod 256 and print as ascii character
 ' get char input and push it mod 256
 n print a newline
 = print the stack as space seperated numbers.
 ~ print the stack as ascii 
 ; get number input and push it
 : duplicate top stack value
 $ swap top two stack values
 , discard top stack value
 R reverse the stack
 | push length of stack
 & pop a number and push its ascii digits (and decimal point).
 X pop the stack and push it to the x register
 x push everything in the x register to the stack and empty it.
 r push a random integer into the x register. if it's 0, hang up the system forever.
 Q turn the stack into a queue. There is now way to turn it back.
 q print the program's source code.
 h print "Hello, World!"
 s interpret stdin as IINWII code. It can erase your hard disk if you use it to cheat in a golfing challenge.
 [] code blocks
 i if/else statement - if top of stack is nonzero, do last code block, else the second next (this can be omitted)
 w while loop - repeat last code block until top of stack is zero.
 z break out of loop or end program
 g do nothing
 L if running the program with all L's remove will cause infinite loop, halt the program with an error.
 p undefined behavior. DO. NOT. USE. IT.
 j pop x, jump to the xth line. This has a 0.01% chance that it will blow up the computer.
 Z if P=NP, erases your hard disk.
 d The use of this instruction is discouraged.
 f The use of this instruction is forbidden.
 . the please modifier. Must be used before 1 in 6 commands, but less that 2 in 3. Taken from INTERCAL.
 H starts hq9+ mode.
 k starts bf mode.
 u starts underload mode.
===bf mode===
This turns on when you enter the k command. These are the only commands available, it turns the esolang into a bf derivative.You still need to use the please (.) command.
 + add one to cell
 - subtract one from cell
 < pointer left
 > pointer right
 _ print cell
 @ print cell as ascii
 * multiply cell by next
 / divide cell by next
 j push cell to stack (only way to access the stack)
 [] codeblocks.
 i if cell is nonzero.
 w while cell is nonzero.
 ? set cell to random float between 0 and 1.
 d undefined behavior. Do not use it.
 E if cell is 0, turn off bf mode.
===hq9+ mode===
This is like bf mode, but its now an HQ9+ derivative.
 H print "Hello world"
 Q quine
 N 99 bottles of beer
 + increment accumulator
 , divide accumulator by ten.
 F print fizzbuzz from accumulator
 E turn off hq9+ mode and push accumulator to stack.
===underload mode===
This is like bf mode, but it takes underload instructions, as well as this command:
 E turn off underload mode and push ascii values of top string of underload stack of main stack reversed.
==examples==
truth machine:
 .;.[:_]w_
hello world:
 .HH
no:
 .pdf
do not:
 .0j
please dont:
 .kd
Category:LanguagesCategory:Joke languagesCategory:Turing completeCategory:UnimplementedCategory:Nondeterministic