Eror

Hello, this is my third Esolang, Eror. I'm User:5anz. This Esolang is about making errors (known as erors here) intentionally, since there are no real control flow options (If this then that, Do this until this condition is met, etc.) other than EROR:. This Esolang is actually inspired by Javagony.

Syntax

Functions

There are a handful of functions, and, unlike my other (non-joke) Esolang (B i n a r y), it's easy to tell where the gap between two functions are... mainly because you need effort to really do that. There are 9 Functions.

Functions

Function	Parameters	Description
PRINT	text	Prints the text (\" removes the \ and prints the ").
DEF	var = int	Defines a new variable (var) equal to the value of int.
SET	var = int	Like DEF, but it redefines var instead.
INPUT	var	Asks the user for input as a number, then SETs var to that number.
PUSH	int	Pushes int onto the stack (heck yeah there's a stack!).
POP	var	Pops a value off the stack and SETs var to that value.
CYCLE	int	If int is positive, send the top value of the stack to the bottom int times, otherwise, do the opposite -int times.
COMMENT	anything*	Does nothing, though writing a comment incorrectly can cause erors.
EROR:	eror type	Whenever an eror occurs, goto this line, and the function doesn't end up happening. Nothing happens if this is hit naturally though*. Example, "EROR: DIVIDED BY ZERO" will get jumped to if you ever hit "PRINT 1 / 0".

Note: "int" can mean a variable or mathematics, and "text" can mean an integer, mathematics, or even nothing (just PRINT on its own prints nothing, as used in the 99 bottles of beer program).

Note 2: You cannot directly take data from the stack, to print the top value of the stack, you'd have to do something like this...

DEF temp = 0
POP temp
PRINT temp

and then to keep it you'd have to do this:

PUSH temp

Mathematics

You can do a few things with mathematics, and there's even priorities you have to do first (doing higher priorities first, left to right)… just look at the table.

Mathematics

Name	Code	Meaning	Priority
Concatenation	str1 <> str2	Joins two strings together (So 'PRINT "Hello, " <> "World!"), and can even use a number (so '"My favourite number is " <> 12' would get to "My favourite number is 12".	0
Addition	int1 + int2	Add int1 and int2 together.	1
Subtraction	int1 - int2	Subtract int2 from int1.	1
Multiplication	int1 * int2	Multiply int1 and int2 together.	2
Division	int1 / int2	Divide int1 by int2 (prone to erors).	2
Modulo	int1 % int2	Division, but use the remainder instead.	3
Brackets	( int1 * int2 )	Simply just adds priority to everything inside.	+4 per bracket (but don't use it on Concatenation, it has Priority 0 for a reason).

The function its self would have a priority of -1 if you need to know. The gotoieness of the function -0.5.

Erors

There are... ALOT, of erors, more than there are functions and mathematics stuff, this is mainly because these are your ONLY form of control flow, again, No ifs, No loops, no... anything other than EROR:, You rely on dividing by zero, add number Just below 32767, functions like IF, WHEN, STOP, etc., etc.

This language isn't Turing complete due to a minor lack of erors, I'm sorry, I tried to delay being unable to make programs due to a lack of erors (you can see how desperate I was with ERROR)

To type an eror line, do this (Div by zero used as an example):

EROR: DIVIDED BY ZERO

Erors have been categorized, so go to Contents and look under "1.3 Erors"

Functions

Name	Functionality	Activation
FUNCTION DOES NOT EXIST	A function that doesn't exist has been used.	IF var = 0
WRONG PERAMETERS	The wrong parameters have been used for a function.	DEF "Hello, World!"
WRONG CAPITALIZATION	Used lowercase where there should have been uppercase or vice versa	print STR

Mathematics

NOT A NUMBER	Attempted to do mathematics with a string.	PRINT "str1" * "str2"
CAN'T CONCATENATE	Tried to concatenate 2 integers.	PRINT 1 <> 2
OUT OF RANGE	A number has exceeded the 16-bit limit (between and including -32768 to 32767	DEF var = 32768
DIVIDED BY ZERO	A classic, tried to divide by 0.	PRINT 1 / 0
DIVIDED INTO RATIONALITY	Tried to divide a number by a number that isn't divisible.	PRINT 3 / 2
MODDED BY ZERO	DIVIDED BY ZERO, but with modulo.	PRINT 1 % 0
TOO CLOSE	You didn't add spaces.	PRINT 3+2
TOO FAR	You added too many spaces.	Esolang won't let me add a bunch of spaces, use your imagination.
NO SIGN	You were so focused on adding the correct number of spaces that you forgot to do an operation.	PRINT 3 2
NO NUMBER	You forgot to add a number.	PRINT 3 * + 2
SYMBOL UNDEFINED	You used a symbol that isn't defined.	PRINT 3 = 2
UNMATCHED BRACKETS	Their either isn't an equal amount of open and closed brackets, or a closed bracket comes before an opening bracket	COMMENT Both of these result in this eror. PRINT ) 3 + 2 ( PRINT ( 3 + 2
UNMATCHED QUOTES	There are an odd number of quotation marks (excluding \" after an odd number of quotes	PRINT "Hello, world!

Definitions & Redefinitions

VARIABLE NOT DEFINED	Tried to use/set a variable that hasn't been defined yet.	SET undef = 5 COMMENT We haven't defined undef yet.
VARIABLE ALREADY DEFINED	Tried to define a variable that already exists.	DEF var = 0 DEF var = 1
CAN NOT DEFINE NUMBERS	Tried to define a number	DEF 5 = 12
THIS IS NOT FORTE	Tried to redefine a number... like Forte.	Set 5 = 12
NOTHING IS INVALID	Added an equals, but nothing after it.	SET var =
WRONG INPUT	Your user typed either a string or an out of bounds number.	PRINT "What's the 13th letter on the keyboard?" INPUT var COMMENT Hope this works.
INVALID CHARACTERS	A variable uses character that isn't a lowercase letter or a number.	DEF vary_able = 6
DEFINED AN EQUATION	You tried to define an equation instead of a variable	DEF var1 + var2 = 3
SET AN EQUATION	You tried to redefine an equation instead of a variable	SET var1 + var2 = 3

Stack

STACK IS TOO LARGE	The stack has 256 items (I love this activation).	EROR: DIVIDED BY ZERO PUSH 1 PRINT 1 / 0
STACK IS EMPTY	Tried to POP an empty stack.	COMMENT The stack is empty right now POP var

Comments

Remember what I said about your comments being written correctly?

Name	Functionality + Activation
IMPROPER GRAMMAR	COMMENT Your comment doesn't contain a full stop/period
TOO LONG	COMMENT Your comment contains things after the full stop. To get around this, you can just use 2 commas, idk.
TOO COMPLICATED	COMMENT Your comment contains an exclamation/question mark!

Erors

These erors refer to other erors.

We're going back to what we did earlier.

ERROR	You typed ERROR instead of EROR.	ERROR: DIVIDED BY ZERO
EROR DOES NOT EXIST	The eror you have typed isn't in this list.	EROR: I LIKE ESOLANGS
TOO MANY ERORS	Have multiple erors on the same line.	DEF var = 0 DEF var = 1 / 0
EROR NOT FOUND	Cause an eror without a corresponding eror line.	COMMENT Dividing by zero is over-used, just know that there's no "IMPROPER GRAMMAR" line
EROR FOUND TOO MANY TIMES	Cause an eror with multiple corresponding eror lines.	IF var = 0 EROR: FUNCTION DOES NOT EXIST EROR: FUNCTION DOES NOT EXIST

Note: If either of the last 2 meet their own condition, the program just ends.

Other note: erors with writing are prioritized over erors with... not writing (it's hard to explain without an example), so

PRINT 1/0

would result in a TOO CLOSE eror, even though you're dividing by 0.

Example Programs

Hello, World!

Not very interesting, this is in the group of esolangs where text is incredibly easy to print.

PRINT "Hello, World!"

Truth Machine

More interesting, since you can't do normal flow control

COMMENT Take input.
DEF truth = 0
INPUT truth

COMMENT Beginning of the loop.
EROR: DIVIDED BY ZERO

PRINT truth

COMMENT Go to the beginning of the loop, if truth is 0, 1-0=1, 1/1=1, and if truth is 1, 1-1=0, and 1/0 is a divide by zero eror.
DEF loop = 1 / ( 1 - truth )

99 bottles of beer

I like this one because of how I ended up doing it, being jumping into the middle of a loop.

DEF bottles = 99

COMMENT Define bottles, and start a new verse using this comment

EROR: OUT OF RANGE

PRINT bottles <> “ bottles of beer on the wall!”
PRINT
COMMENT Yes, you can do that.

COMMENT Start a new verse.
EROR: IMPROPER GRAMMAR

PRINT bottles <> “ bottles of beer on the wall,”
PRINT bottles <> “ bottles of beer!”
PRINT “Take one down, pass it around,”

COMMENT Decrements the number of bottles of beer on the wall.
SET bottles = bottles – 1

COMMENT Checks if bottles is less than 2 and jumps back if it isn’t.
DEF loop = bottles + 32766

COMMENT Now that we’re on the last set of things to print, there’s no reason we can’t just hardcode it.
PRINT “1 bottle of beer on the wall!”
PRINT
PRINT “1 bottle of beer on the wall,”
PRINT “1 bottle of beer!”
PRINT “Take it down, pass it around,”
PRINT “No more bottles of beer on the wall!”

Cat program

I'm not entirely sure if this counts, but this isn't very interesting.

DEF x = 0
INPUT x
PRINT x

The reason I included this even though it isn't interesting was because what I am interested in is the

Exclusionary cat program

, which is basically just a cat program, but a certain input is excluded, in this case, 5.

COMMENT Beginning of a normal cat program.
DEF x = 0
INPUT x

COMMENT Results in a divide by 0 eror if x = 5.
DEF exclude = 1 / ( x – 5 )

COMMENT There’s a large chance we divide into irrationality, so we add this to avoid that.
EROR: DIVIDED INTO IRATIONALITY
PRINT x

The best part is that we don't even need EROR: DIVIDED BY ZERO, because the lack of it and EROR: EROR NOT FOUND ends the program immediately!

Number guessing game

Due to the randomness, or, lack of it, in EROR, this is only fun the first time you've tried it, and if you haven't seen the code. In this case, it'll be hardcoded to 12.

DEF x = 0
DEF check = 0
PRINT “Give me a number!”
COMMENT Set-up the program. This comment sends you to after you’re told if you’re too high or too low.

EROR: OUT OF RANGE
PRINT “Too high!”
COMMENT Your number is greater than 12. Skip printing “Too low”.

EROR: IMPROPER GRAMMAR
PRINT “Too low!”
COMMENT Your number isn’t greater than or equal to 12. Or in other words, it’s less than 12.

COMMENT Invalid guess, tell the user to try again.
EROR: WRONG INPUT
PRINT “Invalid input, try again.”

COMMENT Take another guess.
EROR: TOO LONG
INPUT x

COMMENT Check if your number is too large.
SET check = x + 32755

COMMENT Check if your number is 12.
SET check = 1 / ( x - 12 )
EROR: DIVIDED INTO RATIONALITY

COMMENT If you got this far, you number is neither 12, nor greater

COMMENT Your number is 12.
EROR: DIVIDED BY ZERO
PRINT “Correct!”

The general process of changing it would be changing

SET check = x + 32755

in a way that if you changed your number to 18, you'd be add 6, so you subtract 6, in this case,

SET check = x + 32749

and you'd also change

SET check = 1 / ( x - 12 )

to be... do I need to say it?

SET check = 1 / ( x - 18 )

Factorial

The factorial is probably the only program that uses the stack, though, it doesn't use cycle.

COMMENT Define the number you want to factorialize.
DEF x = 0
INPUT x

COMMENT Push all the numbers between 1 and your input onto the stack.
EROR: OUT OF RANGE
PUSH x
SET x = x – 1
DEF check = x + 32767

DEF factorial = 1

COMMENT Start the loop.
EROR: ERROR

COMMENT Multiply by the next number.
POP x
SET factorial = factorial * x

COMMENT End the loop.
EROR: STACK IS EMPTY
ERROR: TOO LONG

COMMENT Self explanatory.
PRINT factorial

External Resources

Unfortunately, no interpreter has been made, but I'm working on one! I promise this won't end up like B i n a r y...

Proof this isn't Turing Complete

There's only one thing I have to say... there's limited erors. The problem is that you may need, say, fifty (though it's unlikely). And even worse, you only have two places to go after checking if something is equal, and only ONE place to check if something is greater/less than something else!