Editing Module:Adjacent stations/doc (section)

== Terms ==
{{for|a more comprehensive overview of Lua|:mw:Extension:Scribunto/Lua reference manual}}

* Lua has ''data types''. The ones relevant here are ''boolean'', ''string'', ''number'', and ''table''.
** A ''[[Boolean data type|boolean]]'' is either <code>true</code> or <code>false</code>.
** A ''string'' is text, stored as a list of characters. While Lua has several ways of indicating strings within code, in the Lua examples here, strings are indicated by enclosing text in double quotes (e.g. <code>"This is a string"</code>).
** A ''number'' is a numerical value, like <code>0.5</code> or <code>42</code>.
** A ''table'' is a structure that can contain other objects, including other tables.
*** An empty table looks like <code>{}</code> in the code.
*** Tables have ''keys'' and ''values'', which are typically of the structure <code>["<var>key</var>"] = <var>value</var></code>; each key–value pair is separated by a comma. All keys used here are strings or numbers.
*** <code>{"text", "more text"}</code> is equivalent to <code>{[1] = "text", [2] = "more text"}</code>.
* A ''variable'' can be defined using <code>local <var>variable_name</var> = <var>"value"</var>.</code>
* ''Whitespace'' is any tab, line break or other space. Whitespace doesn't matter in Lua, but all examples here except for those inline with text are neatly indented for readability, with separate table keys on separate lines.
* A ''return statement'' (e.g. <code>return <var>variable_name</var></code>) causes a function to exit and reports the value of <code><var>variable_name</var></code>. The "function" here is the code in the main module calling the subpage, and the <code><var>variable_name</var></code> should be the data table.