Learn Moonscript - 10 Code Examples & CST Typing Practice Test

MoonScript is a high-level, dynamic programming language that compiles to Lua. It provides syntactic sugar, cleaner syntax, and modern language features like classes, comprehensions, and pattern matching, while maintaining full compatibility with Lua runtime.

View all 10 Moonscript code examples →

MoonScript Counter and Theme Toggle MoonScript Random Number Generator MoonScript Todo List MoonScript Stopwatch MoonScript Temperature Converter MoonScript Dice Roller MoonScript Countdown Timer MoonScript Name Greeting MoonScript Prime Checker MoonScript Shopping Cart

Learn MOONSCRIPT with Real Code Examples

Updated Nov 21, 2025

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Code Sample Descriptions

MoonScript Counter and Theme Toggle

count = 0
isDark = false

updateUI = ->
    print "Counter: #{count}"
    print "Theme: #{if isDark then 'Dark' else 'Light'}"

increment = ->
    count += 1
    updateUI!

decrement = ->
    count -= 1
    updateUI!

reset = ->
    count = 0
    updateUI!

toggleTheme = ->
    isDark = not isDark
    updateUI!

# Simulate actions
updateUI!
increment!
increment!
toggleTheme!
decrement!
reset!

Demonstrates a simple counter with theme toggling using MoonScript variables and functions.

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MoonScript Random Number Generator

generate = ->
    num = math.random 1, 100
    parity = if num % 2 == 0 then 'Even' else 'Odd'
    print "Number: #{num}, #{parity}"

# Simulate actions
generate!
generate!
generate!

Generates a random number and shows if it is odd or even.

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MoonScript Todo List

todos = {}

updateUI = ->
    print "Todo List:"
    for i, task in ipairs todos
        print "#{i}. #{task}"
    print "----------------"

addTask = (task) ->
    table.insert todos, task
    updateUI!

removeTask = (index) ->
    table.remove todos, index
    updateUI!

# Simulate actions
addTask 'Buy milk'
addTask 'Write MoonScript code'
removeTask 1

Maintains a simple todo list with add and remove functions.

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MoonScript Stopwatch

time = 0
running = false

updateUI = ->
    print "Stopwatch: #{time} seconds"

start = ->
    running = true
    print 'Stopwatch started'

stop = ->
    running = false
    print 'Stopwatch stopped'

reset = ->
    time = 0
    updateUI!

# Simulate actions
updateUI!
start!
time += 5
updateUI!
stop!
reset!

Simulates a stopwatch with start, stop, and reset functionality.

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MoonScript Temperature Converter

celsiusToF = (c) -> (c * 9 / 5) + 32
fToCelsius = (f) -> (f - 32) * 5 / 9

updateUI = (temp, scale) ->
    if scale == 'C'
        print "#{temp}°C = #{celsiusToF temp}°F"
    else
        print "#{temp}°F = #{fToCelsius temp}°C"

# Simulate actions
updateUI 25, 'C'
updateUI 77, 'F'

Converts Celsius to Fahrenheit and vice versa.

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MoonScript Dice Roller

rollDice = ->
    result = math.random 1, 6
    print "Rolled: #{result}"

# Simulate actions
rollDice!
rollDice!
rollDice!

Rolls a dice and prints the result.

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MoonScript Countdown Timer

count = 5

updateUI = ->
    print "Countdown: #{count}"

startCountdown = ->
    while count > 0
        updateUI!
        count -= 1
    updateUI!
    print 'Done!'

# Simulate actions
startCountdown!

Counts down from a number to zero.

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MoonScript Name Greeting

greet = (name) ->
    print "Hello, #{name}! Welcome!"

# Simulate actions
greet 'Saurav'
greet 'Alice'
greet 'Bob'

Greets the user with their name.

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MoonScript Prime Checker

isPrime = (n) ->
    return false if n < 2
    for i in [2..math.floor(math.sqrt n)]
        return false if n % i == 0
    true

checkNumber = (num) ->
    print "#{num} is #{if isPrime num then 'Prime' else 'Not Prime'}"

# Simulate actions
checkNumber 7
checkNumber 10
checkNumber 13

Checks if a number is prime.

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MoonScript Shopping Cart

cart = {}
total = 0

updateUI = ->
    print "Cart Items:"
    for item, price in pairs cart
        print "#{item}: $#{price}"
    print "Total: $#{total}"
    print '----------------'

addItem = (item, price) ->
    cart[item] = price
    total += price
    updateUI!

removeItem = (item) ->
    if cart[item]
        total -= cart[item]
        cart[item] = nil
    updateUI!

# Simulate actions
addItem 'Apple', 2
addItem 'Banana', 3
removeItem 'Apple'

Simulates adding and removing items in a shopping cart with total cost.

Let’s Try →

Frequently Asked Questions about Moonscript

What is Moonscript?

What are the primary use cases for Moonscript?

Scripting for games (Love2D, Roblox). Writing concise Lua programs. Rapid prototyping in Lua environments. Embedding in applications with Lua runtime. Creating libraries compatible with Lua

What are the strengths of Moonscript?

Improves code readability over Lua. Maintains full Lua compatibility. Supports modern programming patterns. Lightweight with zero runtime overhead. Ideal for rapid prototyping

What are the limitations of Moonscript?

Dependent on Lua runtime. Smaller community than Lua itself. Debugging maps to generated Lua code. Limited IDE/editor support. Less suitable for large enterprise codebases without Lua experience

How can I practice Moonscript typing speed?

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

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Code Sample Descriptions

MoonScript Counter and Theme Toggle

count = 0
isDark = false

updateUI = ->
    print "Counter: #{count}"
    print "Theme: #{if isDark then 'Dark' else 'Light'}"

increment = ->
    count += 1
    updateUI!

decrement = ->
    count -= 1
    updateUI!

reset = ->
    count = 0
    updateUI!

toggleTheme = ->
    isDark = not isDark
    updateUI!

# Simulate actions
updateUI!
increment!
increment!
toggleTheme!
decrement!
reset!

Demonstrates a simple counter with theme toggling using MoonScript variables and functions.

Let’s Try →

MoonScript Random Number Generator

generate = ->
    num = math.random 1, 100
    parity = if num % 2 == 0 then 'Even' else 'Odd'
    print "Number: #{num}, #{parity}"

# Simulate actions
generate!
generate!
generate!

Generates a random number and shows if it is odd or even.

Let’s Try →

MoonScript Todo List

todos = {}

updateUI = ->
    print "Todo List:"
    for i, task in ipairs todos
        print "#{i}. #{task}"
    print "----------------"

addTask = (task) ->
    table.insert todos, task
    updateUI!

removeTask = (index) ->
    table.remove todos, index
    updateUI!

# Simulate actions
addTask 'Buy milk'
addTask 'Write MoonScript code'
removeTask 1

Maintains a simple todo list with add and remove functions.

Let’s Try →

MoonScript Stopwatch

time = 0
running = false

updateUI = ->
    print "Stopwatch: #{time} seconds"

start = ->
    running = true
    print 'Stopwatch started'

stop = ->
    running = false
    print 'Stopwatch stopped'

reset = ->
    time = 0
    updateUI!

# Simulate actions
updateUI!
start!
time += 5
updateUI!
stop!
reset!

Simulates a stopwatch with start, stop, and reset functionality.

Let’s Try →

MoonScript Temperature Converter

celsiusToF = (c) -> (c * 9 / 5) + 32
fToCelsius = (f) -> (f - 32) * 5 / 9

updateUI = (temp, scale) ->
    if scale == 'C'
        print "#{temp}°C = #{celsiusToF temp}°F"
    else
        print "#{temp}°F = #{fToCelsius temp}°C"

# Simulate actions
updateUI 25, 'C'
updateUI 77, 'F'

Converts Celsius to Fahrenheit and vice versa.

Let’s Try →

MoonScript Dice Roller

rollDice = ->
    result = math.random 1, 6
    print "Rolled: #{result}"

# Simulate actions
rollDice!
rollDice!
rollDice!

Rolls a dice and prints the result.

Let’s Try →

MoonScript Countdown Timer

count = 5

updateUI = ->
    print "Countdown: #{count}"

startCountdown = ->
    while count > 0
        updateUI!
        count -= 1
    updateUI!
    print 'Done!'

# Simulate actions
startCountdown!

Counts down from a number to zero.

Let’s Try →

MoonScript Name Greeting

greet = (name) ->
    print "Hello, #{name}! Welcome!"

# Simulate actions
greet 'Saurav'
greet 'Alice'
greet 'Bob'

Greets the user with their name.

Let’s Try →

MoonScript Prime Checker

isPrime = (n) ->
    return false if n < 2
    for i in [2..math.floor(math.sqrt n)]
        return false if n % i == 0
    true

checkNumber = (num) ->
    print "#{num} is #{if isPrime num then 'Prime' else 'Not Prime'}"

# Simulate actions
checkNumber 7
checkNumber 10
checkNumber 13

Checks if a number is prime.

Let’s Try →

MoonScript Shopping Cart

cart = {}
total = 0

updateUI = ->
    print "Cart Items:"
    for item, price in pairs cart
        print "#{item}: $#{price}"
    print "Total: $#{total}"
    print '----------------'

addItem = (item, price) ->
    cart[item] = price
    total += price
    updateUI!

removeItem = (item) ->
    if cart[item]
        total -= cart[item]
        cart[item] = nil
    updateUI!

# Simulate actions
addItem 'Apple', 2
addItem 'Banana', 3
removeItem 'Apple'

Simulates adding and removing items in a shopping cart with total cost.

Let’s Try →

Frequently Asked Questions about Moonscript

What is Moonscript?

What are the primary use cases for Moonscript?

Scripting for games (Love2D, Roblox). Writing concise Lua programs. Rapid prototyping in Lua environments. Embedding in applications with Lua runtime. Creating libraries compatible with Lua

What are the strengths of Moonscript?

Improves code readability over Lua. Maintains full Lua compatibility. Supports modern programming patterns. Lightweight with zero runtime overhead. Ideal for rapid prototyping

What are the limitations of Moonscript?

Dependent on Lua runtime. Smaller community than Lua itself. Debugging maps to generated Lua code. Limited IDE/editor support. Less suitable for large enterprise codebases without Lua experience

How can I practice Moonscript typing speed?

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