Bug hunt — the language core

You know the tools now — variables, functions, conditionals, loops, events. Bugs in this section are rarely big. They're one character: a missing local, a single = where you meant ==, a task.wait that never got written. This lesson is a training ground for exactly those.

#Hunt one — the missing local

coins = 0

#Hunt two — the wrong equals

if coins = 5 then

#Hunt three — the frozen game

Press Play and your game freezes instantly. Output shows no error — the game is stuck inside a loop that never ends and never breathes.

while true do
    print("tick")
end

#Hunt four — the nil argument

function addCoins(amount)
    coins = coins + amount
end

addCoins()

#Hunt five — type the fix

A coin counter never changes. Spot the bug in the snippet and type the fixed line.

local coins = 0

coins == coins + 1

#Hunt six — put the loop together

One last hunt, but this time you assemble it. Arrange the lines so a part's click gives the player a coin each time — no imposters.