### Execute script and observe output

Source: https://jonathanturnock.github.io/civ-vi-modding/docs/lua-reference/variables-and-assignment

Example console output when running the local variable script.

```text
lua.exe helloWorld.lua
nil
3.14159
nil
```

--------------------------------

### Hello World Lua Script

Source: https://jonathanturnock.github.io/civ-vi-modding/docs/lua-reference/installation

A simple script to verify the Lua interpreter installation.

```lua
---
--- Simple Hello World Example to test the Lua Interpreter
---
print("Hello World")
```

--------------------------------

### Python Syntax Highlighting

Source: https://jonathanturnock.github.io/civ-vi-modding/docs/reference

Example of Python code block with syntax highlighting.

```python
s = "Python syntax highlighting"
print(s)
```

--------------------------------

### Function Highlighting Example

Source: https://jonathanturnock.github.io/civ-vi-modding/docs/reference

A code block containing a function definition.

```javascript
function highlightMe() {
console.log('This line can be highlighted!');
}
```

--------------------------------

### JavaScript Syntax Highlighting

Source: https://jonathanturnock.github.io/civ-vi-modding/docs/reference

Example of JavaScript code block with syntax highlighting.

```javascript
var s = 'JavaScript syntax highlighting';
alert(s);
```

--------------------------------

### Configure AppOptions.txt for FireTuner

Source: https://jonathanturnock.github.io/civ-vi-modding/docs/fire-tuner

Set FullScreen to 0 (windowed) and EnableTuner to 1 in AppOptions.txt to allow FireTuner to connect.

```ini
;0 : windowed, 1 : fullscreen, 2 : windowed with no title bar
FullScreen 0
...
[Debug]
;Enable FireTuner.
EnableTuner 1
...
```

--------------------------------

### Print Hello World from the FireTuner Lua Console

Source: https://jonathanturnock.github.io/civ-vi-modding/docs/hello-world-lua-mod

Paste this line into the FireTuner Lua Console to send 'Hello World from the Lua Console' to the Lua.log file located at %USERPROFILE%\Documents\My Games\Sid Meier's Civilization VI\Logs\Lua.log.

```Lua
print("Hello World from the Lua Console")
```

--------------------------------

### Print Hello World in FireTuner Lua Console

Source: https://jonathanturnock.github.io/civ-vi-modding/docs/fire-tuner

Execute this Lua command in the FireTuner console to print 'Hello World' in the running game.

```lua
print("Hello World")
```

--------------------------------

### HelloWorldMod .MODINFO File with InGameActions

Source: https://jonathanturnock.github.io/civ-vi-modding/docs/hello-world-lua-mod

The generated .MODINFO file for the HelloWorldMod. It contains the InGameActions section with AddGameplayScripts that loads HelloWorld.Lua, which is required for the script to run.

```XML
<?xml version="1.0" encoding="utf-8"?>
<Mod id="08cf90c9-a50b-42b9-a424-916def81f001" version="1">
<Properties>
<Name>Hello World Mod</Name>
<Description>A Simple Hello World Modification to print Hello World to the game logs</Description>
<Created>1605041890</Created>
<Teaser>A Simple Hello World Modification to print Hello World to the game logs</Teaser>
<Authors>Jonathan Turnock</Authors>
<CompatibleVersions>1.2,2.0</CompatibleVersions>
</Properties>
<InGameActions>
<AddGameplayScripts id="LoadHelloWorld">
<File>HelloWorld.Lua</File>
</AddGameplayScripts>
</InGameActions>
<Files>
<File>HelloWorld.Lua</File>
</Files>
</Mod>
```

--------------------------------

### HelloWorld.Lua Script with Print Statement

Source: https://jonathanturnock.github.io/civ-vi-modding/docs/hello-world-lua-mod

The Lua script file created in ModBuddy for the HelloWorldMod project. It includes a header comment and prints 'Hello World from the Lua Script' to the game logs.

```Lua
-- HelloWorld
-- Author: jonat
-- DateCreated: 11/10/2020 7:57:33 PM
--------------------------------------------------------------
print("Hello World from the Lua Script")
```

--------------------------------

### Declare and print a global variable

Source: https://jonathanturnock.github.io/civ-vi-modding/docs/lua-reference/variables-and-assignment

Demonstrates declaring a global variable and printing its value.

```lua
helloWorldMessage = "Hello World"
print(helloWorldMessage) -->> Hello World
```

--------------------------------

### Define a global constant in a file

Source: https://jonathanturnock.github.io/civ-vi-modding/docs/lua-reference/variables-and-assignment

Creating a file to hold a global constant.

```lua
--- constants.lua
PI = 3.14159
```

--------------------------------

### Import and use a global constant

Source: https://jonathanturnock.github.io/civ-vi-modding/docs/lua-reference/variables-and-assignment

Using dofile to import a global variable from another file.

```lua
---printPi.lua
-- Reference Before Import
print(PI) -->> nil
-- Import Constants
dofile("constants.lua")
-- Reference after import
print(PI) -->> 3.14159
```

--------------------------------

### Execute Lua Script via Command Prompt

Source: https://jonathanturnock.github.io/civ-vi-modding/docs/lua-reference/installation

Command to run a Lua file using the standalone interpreter.

```bash
lua.exe helloWorld.lua
```

--------------------------------

### Demonstrate variable scope in functions

Source: https://jonathanturnock.github.io/civ-vi-modding/docs/lua-reference/variables-and-assignment

Shows how variables defined inside a function scope behave compared to global variables.

```lua
--<< Top Level Scope Starts
print(pi) -->> nil
print(localPi) -->> nil
function definePI() --<< Function Scope Starts
pi = 3.14
local localPi = 3.14
print(pi) -->> 3.14
print(localPi) -->> 3.14
end --<< Function Scope Ends
definePI()
print(pi) -->> 3.14
print(localPi) -->> nil
--<< Top Level Scope Ends
```

--------------------------------

### VS Code Lua Extension Metadata

Source: https://jonathanturnock.github.io/civ-vi-modding/docs/lua-reference/installation

Details for the sumneko.lua extension used for Lua language support in Visual Studio Code.

```text
Name: Lua
Id: sumneko.lua
Description: Lua Language Server coded by Lua
Version: 1.0.4
Publisher: sumneko
VS Marketplace Link: https://marketplace.visualstudio.com/items?itemName=sumneko.lua
```

--------------------------------

### VS Code Code Runner Extension Metadata

Source: https://jonathanturnock.github.io/civ-vi-modding/docs/lua-reference/installation

Details for the Code Runner extension, which enables running Lua files directly from the VS Code right-click menu.

```text
Name: Code Runner
Id: formulahendry.code-runner
Description: Run C, C++, Java, JS, PHP, Python, Perl, Ruby, Go, Lua, Groovy, PowerShell, CMD, BASH, F#, C#, VBScript, TypeScript, CoffeeScript, Scala, Swift, Julia, Crystal, OCaml, R, AppleScript, Elixir, VB.NET, Clojure, Haxe, Obj-C, Rust, Racket, Scheme, AutoHotkey, AutoIt, Kotlin, Dart, Pascal, Haskell, Nim,
Version: 0.11.1
Publisher: Jun Han
VS Marketplace Link: https://marketplace.visualstudio.com/items?itemName=formulahendry.code-runner
```

--------------------------------

### Attempt to access a local variable from another file

Source: https://jonathanturnock.github.io/civ-vi-modding/docs/lua-reference/variables-and-assignment

Local variables defined in one file cannot be accessed in another, even after importing.

```lua
---printPi.lua
-- Reference Before Import
print(PI) -->> nil
-- Import Constants
dofile("constants.lua")
-- Reference after import
print(PI) -->> nil
```

--------------------------------

### Define a local constant in a file

Source: https://jonathanturnock.github.io/civ-vi-modding/docs/lua-reference/variables-and-assignment

Defining a local variable within a file, making it inaccessible outside that file.

```lua
--- constants.lua
local PI = 3.14159
print(PI) -->> 3.14159
```

--------------------------------

### Declare a local variable

Source: https://jonathanturnock.github.io/civ-vi-modding/docs/lua-reference/variables-and-assignment

Using the local keyword to restrict variable scope.

```lua
local halfPi = PI/2
print(halfPi)
```

--------------------------------

### Reference an undeclared variable

Source: https://jonathanturnock.github.io/civ-vi-modding/docs/lua-reference/variables-and-assignment

Referencing a variable that has not been declared results in a nil value.

```lua
print(nothingHere) -->> nil
```

--------------------------------

### Delete a variable by assigning nil

Source: https://jonathanturnock.github.io/civ-vi-modding/docs/lua-reference/variables-and-assignment

Assigning nil to a variable removes its value and allows memory management to clean it up.

```lua
helloWorldMessage = "Hello World"
print(helloWorldMessage) -->> Hello World
helloWorldMessage = nil
print(helloWorldMessage) -->> nil
```

--------------------------------

### Unspecified Language Code Block

Source: https://jonathanturnock.github.io/civ-vi-modding/docs/reference

A code block without a specified language, demonstrating how HTML tags are rendered within plain text blocks.

```text
No language indicated, so no syntax highlighting.
But let's throw in a <b>tag</b>.
```

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