Learn LUA with Real Code Examples

count = 0

function updateUI()
    print('Button Count: ' .. count)
end

function buttonPress()
    count = count + 1
    updateUI()
end

-- Simulate actions
updateUI()
buttonPress()
buttonPress()

Counts button presses and prints the count to the console.

isDark = false

function updateUI()
    print('Theme: ' .. (isDark and 'Dark' or 'Light'))
end

function toggleTheme()
    isDark = not isDark
    updateUI()
end

-- Simulate actions
updateUI()
toggleTheme()
toggleTheme()

Toggles between Dark and Light themes.

score = 0

function updateUI()
    print('Score: ' .. score)
end

function increment()
    score = score + 10
    updateUI()
end

function decrement()
    score = score - 5
    updateUI()
end

function reset()
    score = 0
    updateUI()
end

-- Simulate actions
updateUI()
increment()
decrement()
reset()

Tracks a score with increment, decrement, and reset.

time = 0

function updateUI()
    print('Time: ' .. time .. ' sec')
end

function tick()
    time = time + 1
    updateUI()
end

-- Simulate actions
updateUI()
tick()
tick()

Counts seconds and prints elapsed time.

health = 100

function updateUI()
    print('Health: ' .. health)
end

function damage(amount)
    health = health - amount
    updateUI()
end

function heal(amount)
    health = health + amount
    updateUI()
end

-- Simulate actions
updateUI()
damage(20)
heal(10)

Tracks health with damage and healing.

level = 1

function updateUI()
    print('Level: ' .. level)
end

function nextLevel()
    level = level + 1
    updateUI()
end

function resetLevel()
    level = 1
    updateUI()
end

-- Simulate actions
updateUI()
nextLevel()
nextLevel()
resetLevel()

Tracks game levels with increment and reset.

coins = 0

function updateUI()
    print('Coins: ' .. coins)
end

function collectCoin()
    coins = coins + 1
    updateUI()
end

function loseCoin()
    coins = coins - 1
    updateUI()
end

-- Simulate actions
updateUI()
collectCoin()
collectCoin()
loseCoin()

Counts coins collected and lost in a game.

ammo = 10

function updateUI()
    print('Ammo: ' .. ammo)
end

function shoot()
    ammo = ammo - 1
    updateUI()
end

function reload()
    ammo = 10
    updateUI()
end

-- Simulate actions
updateUI()
shoot()
shoot()
reload()

Tracks ammo usage with shoot and reload actions.

stars = 0

function updateUI()
    print('Stars: ' .. stars)
end

function collectStar()
    stars = stars + 1
    updateUI()
end

function loseStar()
    stars = stars - 1
    updateUI()
end

-- Simulate actions
updateUI()
collectStar()
collectStar()
loseStar()

Counts collected stars and displays progress.

powerTime = 10

function updateUI()
    print('Power-Up Time: ' .. powerTime)
end

function tick()
    powerTime = powerTime - 1
    updateUI()
end

function resetPower()
    powerTime = 10
    updateUI()
end

-- Simulate actions
updateUI()
tick()
tick()
resetPower()

Counts down power-up duration and resets.