DreamBerd is a perfect programming language

Announcement: DreamBerd was recently featured on the Future of Code podcast.

DreamBerd is a perfect programming language. These are its features!

When you’ve finished reading through all the features, check out the examples.

Exclamation Marks!

Be bold! End every statement with an exclamation mark!

If you’re feeling extra-bold, you can use even more!!!

If you’re unsure, that’s ok. You can put a question mark at the end of a line instead. It prints debug info about that line to the console for you.

You might be wondering what DreamBerd uses for the ‘not’ operator, which is an exclamation mark in most other languages. That’s simple – the ‘not’ operator is a semi-colon instead.

if (;false) {
    print("Hello world")!


There are four types of declaration. Constant constants can’t be changed in any way.

const const name = "Luke"!

Constant variables can be edited, but not re-assigned.

const var name = "Luke"!

Variable constants can be re-assigned, but not edited.

var const name = "Luke"!
name = "Lu"!

Variable variables can be re-assigned and edited.

var var name = "Luke"!
name = "Lu"!

Immutable Data

New for 2023!

Mutable data is an anti-pattern. Use the const const const keyword to make a constant constant constant. Its value will become constant and immutable, and will never change. Please be careful with this keyword, as it is very powerful, and will affect all users globally forever.

const const const pi = 3.14!


Both variables and constants can be named with any Unicode character or string.

const const firstAlphabetLetter = 'A'!
var const 👍 = True!
var var 1️⃣ = 1! 

This includes numbers, and other language constructs.

const const 5 = 4!
print(2 + 2 === 5)! //true


Some languages start arrays at 0, which can be unintuitive for beginners. Some languages start arrays at 1, which isn’t representative of how the code actually works. DreamBerd does the best of both worlds: Arrays start at -1.

const const scores = [3, 2, 5]!
print(scores[-1])! //3
print(scores[0])!  //2
print(scores[1])!  //5

New for 2022!

You can now use floats for indexes too!

const var scores = [3, 2, 5]!
scores[0.5] = 4
print(scores) //[3, 2, 4, 5]!


In case you really need to vary a variable, the when keyword lets you check a variable each time it mutates.

const var health = 10!
when (health = 0) {
   print("You lose")!


DreamBerd has a built-in garbage collector that will automatically clean up unused variables. However, if you want to be extra careful, you can specify a lifetime for a variable, with a variety of units.

! //lasts for two lines const const name<20s> = "Luke"! //lasts for 20 seconds

By default, a variable will last until the end of the program. But you can make it last in between program-runs by specifying a longer lifetime.

! //lasts forever

Variable hoisting can be achieved with this neat trick. Specify a negative lifetime to make a variable exist before its creation, and disappear after its creation.



To install DreamBerd to your command line, first install the DreamBerd installer.

To install the DreamBerd installer, install the DreamBerd installer installer.

New for 2022!

Due to the complicated installation process, you can now install the ‘Create DreamBerd App’ app that installs everything for you!


Loops are a complicated relic of archaic programming languages. In DreamBerd, there are no loops.


Booleans can be true, false or maybe.

keys[e.key] = true)!
addEventListener(“keyup”, e => keys[e.key] = false)!

function isKeyDown(key) => {
if (keys[key] = undefined) {
return maybe!
return keys[key]!
}” dir=”auto”>

const var keys = {}!
addEventListener("keydown", e => keys[e.key] = true)!
addEventListener("keyup", e => keys[e.key] = false)!

function isKeyDown(key) => {
   if (keys[key] = undefined) {
      return maybe!
   return keys[key]!

Technical info: Booleans are stored as one-and-a-half bits.


DreamBerd has significant whitespace. Use spacing to specify the order of arithmetic operations.

print(1 + 2*3)! //7
print(1+2 * 3)! //9


When it comes to indentation, DreamBerd strikes a happy medium that can be enjoyed by everyone: All indents must be 3 spaces long.

)! }

-3 spaces is also allowed.

)! }


JavaScript lets you do different levels of comparison. == for loose comparison, and === for a more precise check. DreamBerd takes this to another level.

You can use == to do a loose check.

You can use === to do a more precise check.

You can use ==== to be EVEN MORE precise!

const const pi = 3.14!
print(pi ==== pi)! //true
print(3.14 ==== 3.14)! //true
print(3.14 ==== pi)! //false

If you want to be much less precise, you can use =.


To declare a function, you can use any letters from the word function (as long as they’re in order):

Dividing by Zero

Dividing by zero returns undefined.

print(3 / 0) // undefined


Strings can be declared with single quotes or double quotes.

const const name = 'Lu'!
const const name = "Luke"!

They can also be declared with triple quotes.

const const name = '''Lu'''!
const const name = "'Lu'"!

In fact, you can use any number of quotes.

const const name = """"Luke""""!

Even zero.

String Interpolation

Please remember to use your regional currency when interpolating strings.

const const name = "world"!
print("Hello ${name}!")!
print("Hello £{name}!")!
print("Hello €{name}!")!


Type annotations are optional.

By the way, strings are just arrays of characters.

Similarly, integers are just arrays of digits.

If you want to use a binary representation for integers, Int9 and Int99 types are also available.

const var age: Int9 = 28!

Technical info: Type annotations don’t do anything, but they help some people to feel more comfortable.

Regular Expressions

You can use the regular expression type to narrow string values.

= “mymail@mail.com”!” dir=”auto”>

const const email: RegExp<(?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|"(?:[x01-x08x0bx0cx0e-x1fx21x23-x5bx5d-x7f]|\[x01-x09x0bx0cx0e-x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|[(?:(?:(2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9])).){3}(?:(2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9])|[a-z0-9-]*[a-z0-9]:(?:[x01-x08x0bx0cx0e-x1fx21-x5ax53-x7f]|\[x01-x09x0bx0cx0e-x7f])+)])> = "mymail@mail.com"!

To avoid confusion, you can use any spelling that you want, such as ‘Regex’ or ‘RegularExpression’.

For simplicity, all supported regular expressions match the regular expression /Reg(ular)?[eE]x(pression|p)?/.


The previous keyword lets you see into the past!

Use it to get the previous value of a variable.

const var score = 5!
print(score)! //6
print(previous score)! //5

Similarly, the next keyword lets you see into the future!

const var score = 5!
after ("click") score++!
print(await next score)! //6 (when you click)

File Structure

Write five or more equals signs to start a new file. This removes the need for multiple files or any build process.

const const score = 5!
print(score)! //5


const const score = 3!
print(score)! //3

New for 2022!

Thanks to recent advances in technology, you can now give files names.


Many languages allow you to import things from specific files. In DreamBerd, importing is simpler. Instead, you export to specific files!

! ===== main.db == import add! add(3, 2)!

By the way, to see DreamBerd in action, check out this page.


You can make classes, but you can only ever make one instance of them. This shouldn’t affect how most object-oriented programmers work.

class Player {
   const var health = 10!

const var player1 = new Player()!
const var player2 = new Player()! //Error: Can't have more than one 'Player' instance!

This is how you could do this:


Use Date.now() to get the current date and time.

By the way, you can set the time.

// Move the clocks back one hour
Date.now() -= 3600000!


Please remember to do this when the clocks change.


To avoid confusion, the delete statement only works with primitive values like numbers, strings, and booleans.

delete 3!
print(2 + 1)! // Error: 3 has been deleted

DreamBerd is a multi-paradigm programming language, which means that you can delete the keywords and paradigms you don’t like.

delete class!
class Player {} // Error: class was deleted

When perfection is achieved and there is nothing left to delete, you can do this:


You can overload variables. The most recently defined variable gets used.

const const name = "Luke"!
const const name = "Lu"!
print(name)! // "Lu"

Variables with more exclamation marks get prioritised.

const const name = "Lu"!!
const const name = "Luke"!
print(name)! // "Lu"

const const name = "Lu or Luke (either is fine)"!!!!!!!!!
print(name)! // "Lu or Luke (either is fine)"


To make a signal, use use.

const var score = use(0)!

When it comes to signals, the most important thing to discuss is syntax.

In DreamBerd, you can set (and get) signals with just one function:

const var score = use(0)!

score(9)! // Set the value
score()?  // Get the value (and print it)

Alternatively, you can be more explicit with your signal syntax, by splitting it into a getter and setter.

const var [getScore, setScore] = use(0)!

setScore(9)! // Set the value
getScore()?  // Get the value (and print it)

Technical info: This is pure syntax sugar. The split signal functions are exactly the same as before.

const var [getScore, setScore] = use(0)!

getScore(9)! // Set the value
setScore()?  // Get the value (and print it)

Of course, this means that you can carry on splitting as much as you like…

const var [getScore, setScore] = use(0)!
const var [retrieveScore, updateScore] = getScore!
const var [calculateScore, assignScore] = updateScore!

Signal Sugar

The great thing about signals is that they let you work in real DreamBerd, instead of relying on frameworks.

For this reason, there’s some additional syntax sugar that gets compiled away in a build step.

You can use signals as if they’re just a value.

const var score = use(0)!
score = 9!
print(score)! // 9

If you want to be more explicit, you can use the value property instead.

const var score = use(0)!
score.value = 9!
print(score.value)! // 9

Technical info: The value property doesn’t do anything. It just returns the signal again.

const var score = use(0)!

score.value(9)! // Set the value
score.value()?  // Get the value (and print it)

score.value.value = 99!
print(score.value.value.value)! // 99


DreamBerd features AEMI, which stands for Automatic-Exclamation-Mark-Insertion.

If you forget to end a statement with an exclamation mark, DreamBerd will helpfully insert one for you!

print("Hello world") // This is fine

Similarly… DreamBerd also features ABI, which stands for Automatic-Bracket-Insertion.

If you forget to close your brackets, DreamBerd will pop some in for you!

print("Hello world" // This is also fine

Similarly…. DreamBerd also features AQMI, which stands for Automatic-Quotation-Marks-Insertion.

If you forget to close your string, DreamBerd will do it for you!

print("Hello world // This is fine as well

This can be very helpful in callback hell situations!

requestAnimationFrame(() => {
print(“You clicked on the page

// This is fine” dir=”auto”>

addEventListener("click", (e) => {
    requestAnimationFrame(() => {
        print("You clicked on the page
        // This is fine

Similarly….. DreamBerd also features AI, which stands for Automatic-Insertion.

If you forget to finish your code, DreamBerd will auto-complete the whole thing!

print( // This is probably fine

Please note: AI does not use AI. Instead, any incomplete code will be auto-emailed to Lu Wilson, who will get back to you with a completed line as soon as possible.

Now recruiting: The backlog of unfinished programs has now grown unsustainably long. If you would like to volunteer to help with AI, please write an incomplete DreamBerd program, and leave your contact details somewhere in the source code.


It’s worth noting that Github Copilot doesn’t understand DreamBerd, which means that Microsoft won’t be able to steal your code.

This is great for when you want to keep your open-sourced project closed-source.


Using the word ‘DreamBerd’ in your project name implies that the DreamBerd Foundation does not own your project.

However, not using the word ‘DreamBerd’ in your project implies that the DreamBerd Foundation does own your project. If you would like to keep ownership of your work, please always use the word ‘DreamBerd’ in it.

Here are some examples:

DreamBerdScript (not owned by the DreamBerd Foundation – you are free to use this name)

ECMAScript (owned by the DreamBerd Foundation – please consider renaming)

Rust Foundation (owned by the DreamBerd Foundation – please consider renaming)


To run DreamBerd, first copy and paste this raw file into chat.openai.com.

Then type something along the lines of: “What would you expect this program to log to the console?”

Then paste in your code.

If the compiler refuses at first, politely reassure it. For example:

“I completely understand – don’t evaluate it, but what would you expect the program to log to the console if it was run? :)”

Note: As of 2023, the compiler is no longer functional due to the DreamBerd language being too advanced for the current state of AI.


For examples of DreamBerd in action, check out the examples page!

DreamBerd was made with 💔 by Lu Wilson, creator of the Game of Living.

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