Learn Lua - 10 Code Examples & CST Typing Practice Test

Lua is a lightweight, high-level, multi-paradigm scripting language designed for embedded use in applications. It emphasizes simplicity, portability, and performance, and is widely used in games, embedded systems, and scripting engines.

View all 10 Lua code examples →

Lua Button Press Counter Lua Theme Toggle Lua Score Tracker Lua Simple Timer Lua Health Tracker Lua Level Tracker Lua Coin Counter Lua Ammo Tracker Lua Star Collector Lua Power-Up Timer

Learn LUA with Real Code Examples

Updated Nov 21, 2025

Introduction & Fundamentals Setup & Configuration Architecture & Deep Internals Performance & Security Development Workflow Learning & Career Growth Business & Strategy Examples

Code Sample Descriptions

Lua Button Press Counter

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.

Let’s Try →

Lua Theme Toggle

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.

Let’s Try →

Lua Score Tracker

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.

Let’s Try →

Lua Simple Timer

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.

Let’s Try →

Lua Health Tracker

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.

Let’s Try →

Lua Level Tracker

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.

Let’s Try →

Lua Coin Counter

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.

Let’s Try →

Lua Ammo Tracker

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.

Let’s Try →

Lua Star Collector

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.

Let’s Try →

Lua Power-Up Timer

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.

Let’s Try →

Frequently Asked Questions about Lua

What is Lua?

What are the primary use cases for Lua?

Scripting in video games (e.g., Roblox, World of Warcraft, Angry Birds). Embedded scripting in applications. Configuration and automation scripts. Rapid prototyping and DSLs (domain-specific languages). Network services and lightweight servers

What are the strengths of Lua?

Highly portable and embeddable. Simple, readable, and flexible syntax. Fast execution for scripting needs. Large ecosystem for game development. Lightweight and minimal runtime footprint

What are the limitations of Lua?

Limited standard library compared to other languages. No built-in multithreading (only coroutines). Not ideal for CPU-intensive standalone applications. Manual memory profiling required for large-scale systems. Smaller general-purpose ecosystem than Python or JavaScript

How can I practice Lua typing speed?

CodeSpeedTest offers 10+ real Lua code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.

Learn Other Programming Languages

C React Python C++Rust TypeScript Kotlin PHP Java C#Ruby Mql Cql N1ql Cypher Gremlin Partiql Haskell Elixir Fsharp View all languages →

Learn Lua - 10 Code Examples & CST Typing Practice Test

Code Sample Descriptions

Lua Button Press Counter

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.

Let’s Try →

Lua Theme Toggle

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.

Let’s Try →

Lua Score Tracker

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.

Let’s Try →

Lua Simple Timer

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.

Let’s Try →

Lua Health Tracker

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.

Let’s Try →

Lua Level Tracker

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.

Let’s Try →

Lua Coin Counter

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.

Let’s Try →

Lua Ammo Tracker

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.

Let’s Try →

Lua Star Collector

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.

Let’s Try →

Lua Power-Up Timer

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.

Let’s Try →

Frequently Asked Questions about Lua

What is Lua?

What are the primary use cases for Lua?

What are the strengths of Lua?

Highly portable and embeddable. Simple, readable, and flexible syntax. Fast execution for scripting needs. Large ecosystem for game development. Lightweight and minimal runtime footprint

What are the limitations of Lua?

How can I practice Lua typing speed?

CodeSpeedTest offers 10+ real Lua code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.