Functions & Handlers

-- Functions and handlers in Bubble
 
-- Define a function using 'function ... end'
function double(x)
  return x * 2
end double
 
-- Define a handler using 'on ... end'
on greet name
  say "Hello," && name & "! Welcome to Bubble! 🫧"
end greet
 
-- Define a recursive function
function factorial(n)
  if n is less than 2 then
    return 1
  end if
  return n * factorial(n - 1)
end factorial
 
-- Fibonacci function
function fibonacci(n)
  if n is less than 2 then
    return n
  end if
  return fibonacci(n - 1) + fibonacci(n - 2)
end fibonacci
 
-- Use the functions
say "=== Functions ==="
say "double(21) =" && double(21)
say "double(7) =" && double(7)
 
say ""
say "=== Handlers ==="
greet("World")
greet("Bubble Developer")
 
say ""
say "=== Factorial ==="
repeat with i from 1 to 10
  say i & "! =" && factorial(i)
end repeat
 
say ""
say "=== Fibonacci ==="
repeat with i from 0 to 12
  say "fib(" & i & ") =" && fibonacci(i)
end repeat