bubblecode

Try it now

Edit the code below and click Run. Everything executes in your browser — nothing is sent to a server.

playground.bubble

-- Welcome to bubblecode!
say "Hello World!"
put "bubblecode" into language
put 2026 into year
 
say "Learning" && language && "in" && year

Two ways to run your code

Whether you want to experiment one line at a time or run a full program, bubblecode has you covered.

>_

Interactive mode

Also called a REPL

Type a line, see it run immediately. Perfect for trying things out, testing ideas, or learning new commands. Think of it like a conversation with the computer — you say something, it responds right away.

> put 5 + 3 into result

> say result

8

Great for: quick experiments, checking how something works, learning step by step.

▶

Run a program

Write it all, then run it

Write your entire program first, then hit Run to execute everything at once. This is how you build real projects — games, quizzes, tools, and more.

-- greeting.bubble

ask "What's your name?" into name

say "Hello," && name & "!"

Great for: building complete programs, saving your work, creating something to share.

Try the REPL

Type one line at a time and see results instantly. Use the up arrow to recall previous commands.

>_bubblecode REPL

Type a line of bubblecode and press Enter.

A taste of bubblecode

Simple syntax, real programs. Click Run on any example.

Variables & output

variables.bubble

-- Natural assignment
put "Alice" into name
set score to 95
 
say name && "scored" && score

Control flow

control_flow.bubble

-- English-like conditions
put 85 into score
 
if score is greater than 90 then
  say "Grade: A"
else if score is greater than 80 then
  say "Grade: B"
else
  say "Keep going!"
end if

Loops

loops.bubble

-- Readable iteration
repeat with i from 1 to 5
  say "Step" && i
end repeat
 
say ""
say "Countdown:"
repeat with i from 3 down to 1
  say "  " & i & "..."
end repeat
say "Go!"

Interactive input

interactive.bubble

-- Ask the user
ask "What's your name?" into name
say "Hello," && name & "!"
say "Welcome to bubblecode!"

Interactive game

tictactoe.bubble

-- Tic Tac Toe in bubblecode
-- Two-player terminal game
 
on showBoard board
  say ""
  put "" into row1
  put "" into row2
  put "" into row3
  repeat with i from 1 to 3
    put itemof(i, board) into c
    if c is "." then
      put text(i) into c
    end if
    put row1 & " " & padright(c, 1) into row1
    if i < 3 then
      put row1 & " |" into row1
    end if
  end repeat
  repeat with i from 4 to 6
    put itemof(i, board) into c
    if c is "." then
      put text(i) into c
    end if
    put row2 & " " & padright(c, 1) into row2
    if i < 6 then
      put row2 & " |" into row2
    end if
  end repeat
  repeat with i from 7 to 9
    put itemof(i, board) into c
    if c is "." then
      put text(i) into c
    end if
    put row3 & " " & padright(c, 1) into row3
    if i < 9 then
      put row3 & " |" into row3
    end if
  end repeat
  say "  " & row1
  say "  ---+---+---"
  say "  " & row2
  say "  ---+---+---"
  say "  " & row3
  say ""
end showBoard
 
function checkWin board, mark
  if itemof(1, board) is mark and itemof(2, board) is mark and itemof(3, board) is mark then
    return true
  end if
  if itemof(4, board) is mark and itemof(5, board) is mark and itemof(6, board) is mark then
    return true
  end if
  if itemof(7, board) is mark and itemof(8, board) is mark and itemof(9, board) is mark then
    return true
  end if
  if itemof(1, board) is mark and itemof(4, board) is mark and itemof(7, board) is mark then
    return true
  end if
  if itemof(2, board) is mark and itemof(5, board) is mark and itemof(8, board) is mark then
    return true
  end if
  if itemof(3, board) is mark and itemof(6, board) is mark and itemof(9, board) is mark then
    return true
  end if
  if itemof(1, board) is mark and itemof(5, board) is mark and itemof(9, board) is mark then
    return true
  end if
  if itemof(3, board) is mark and itemof(5, board) is mark and itemof(7, board) is mark then
    return true
  end if
  return false
end checkWin
 
function boardFull board
  repeat with i from 1 to 9
    if itemof(i, board) is "." then
      return false
    end if
  end repeat
  return true
end boardFull
 
clear
say "=================================="
say "       TIC TAC TOE"
say "=================================="
say "  Player 1 = X    Player 2 = O"
say "  Enter 1-9 to place your mark."
say "=================================="
 
put [".", ".", ".", ".", ".", ".", ".", ".", "."] into board
put "X" into currentMark
put 1 into currentPlayer
put false into gameOver
 
repeat until gameOver is true
  showBoard(board)
  say "  Player" && currentPlayer && "(" & currentMark & "), your turn."
  ask "  Pick a square (1-9):" into move
 
  put number(move) into cell
  if cell < 1 or cell > 9 then
    say "  Pick a number from 1 to 9!"
    wait 1
    clear
    next repeat
  end if
 
  if itemof(cell, board) is "X" or itemof(cell, board) is "O" then
    say "  That square is already taken!"
    wait 1
    clear
    next repeat
  end if
 
  put currentMark into item cell of board
 
  if checkWin(board, currentMark) then
    clear
    showBoard(board)
    say "  Player" && currentPlayer && "(" & currentMark & ") wins!"
    put true into gameOver
  else if boardFull(board) then
    clear
    showBoard(board)
    say "  It's a draw!"
    put true into gameOver
  else
    if currentMark is "X" then
      put "O" into currentMark
      put 2 into currentPlayer
    else
      put "X" into currentMark
      put 1 into currentPlayer
    end if
    clear
  end if
end repeat
 
say ""
say "  Thanks for playing!"

-- Tic Tac Toe in bubblecode
-- Two-player terminal game

on showBoard board
  say ""
  put "" into row1
  put "" into row2
  put "" into row3
  repeat with i from 1 to 3
    put itemof(i, board) into c
    if c is "." then
      put text(i) into c
    end if
    put row1 & " " & padright(c, 1) into row1
    if i < 3 then
      put row1 & " |" into row1
    end if
  end repeat
  repeat with i from 4 to 6
    put itemof(i, board) into c
    if c is "." then
      put text(i) into c
    end if
    put row2 & " " & padright(c, 1) into row2
    if i < 6 then
      put row2 & " |" into row2
    end if
  end repeat
  repeat with i from 7 to 9
    put itemof(i, board) into c
    if c is "." then
      put text(i) into c
    end if
    put row3 & " " & padright(c, 1) into row3
    if i < 9 then
      put row3 & " |" into row3
    end if
  end repeat
  say "  " & row1
  say "  ---+---+---"
  say "  " & row2
  say "  ---+---+---"
  say "  " & row3
  say ""
end showBoard

function checkWin board, mark
  if itemof(1, board) is mark and itemof(2, board) is mark and itemof(3, board) is mark then
    return true
  end if
  if itemof(4, board) is mark and itemof(5, board) is mark and itemof(6, board) is mark then
    return true
  end if
  if itemof(7, board) is mark and itemof(8, board) is mark and itemof(9, board) is mark then
    return true
  end if
  if itemof(1, board) is mark and itemof(4, board) is mark and itemof(7, board) is mark then
    return true
  end if
  if itemof(2, board) is mark and itemof(5, board) is mark and itemof(8, board) is mark then
    return true
  end if
  if itemof(3, board) is mark and itemof(6, board) is mark and itemof(9, board) is mark then
    return true
  end if
  if itemof(1, board) is mark and itemof(5, board) is mark and itemof(9, board) is mark then
    return true
  end if
  if itemof(3, board) is mark and itemof(5, board) is mark and itemof(7, board) is mark then
    return true
  end if
  return false
end checkWin

function boardFull board
  repeat with i from 1 to 9
    if itemof(i, board) is "." then
      return false
    end if
  end repeat
  return true
end boardFull

clear
say "=================================="
say "       TIC TAC TOE"
say "=================================="
say "  Player 1 = X    Player 2 = O"
say "  Enter 1-9 to place your mark."
say "=================================="

put [".", ".", ".", ".", ".", ".", ".", ".", "."] into board
put "X" into currentMark
put 1 into currentPlayer
put false into gameOver

repeat until gameOver is true
  showBoard(board)
  say "  Player" && currentPlayer && "(" & currentMark & "), your turn."
  ask "  Pick a square (1-9):" into move

put number(move) into cell
  if cell < 1 or cell > 9 then
    say "  Pick a number from 1 to 9!"
    wait 1
    clear
    next repeat
  end if

if itemof(cell, board) is "X" or itemof(cell, board) is "O" then
    say "  That square is already taken!"
    wait 1
    clear
    next repeat
  end if

put currentMark into item cell of board

if checkWin(board, currentMark) then
    clear
    showBoard(board)
    say "  Player" && currentPlayer && "(" & currentMark & ") wins!"
    put true into gameOver
  else if boardFull(board) then
    clear
    showBoard(board)
    say "  It's a draw!"
    put true into gameOver
  else
    if currentMark is "X" then
      put "O" into currentMark
      put 2 into currentPlayer
    else
      put "X" into currentMark
      put 1 into currentPlayer
    end if
    clear
  end if
end repeat

say ""
say "  Thanks for playing!"

Try it now

Why bubblecode?

English-like syntax

Runs in the browser

Interactive programs

Functions & recursion

Rich built-ins

Live documentation