.lua File — Lua Script

Lua is a lightweight, embeddable scripting language created at the Pontifical Catholic University of Rio de Janeiro, Brazil, in 1993. LUA files contain source code in a dynamically-typed language designed for extending applications as a powerful, efficient, and portable scripting layer. Lua's entire interpreter compiles to under 300 KB, making it the most popular choice for embedding scripting capabilities in games, embedded systems, and applications. Lua is the primary scripting language for numerous game engines including Roblox, World of Warcraft (addons), Garry's Mod, and LÖVE, as well as network tools like Wireshark, web servers like Nginx (via OpenResty), and databases like Redis. The language features tables as its single compound data structure (serving as arrays, dictionaries, objects, and modules), first-class functions, closures, coroutines for cooperative multitasking, and metatables for operator overloading and prototype-based inheritance. LuaJIT, a just-in-time compiler for Lua, is one of the fastest dynamic language implementations available. Lua's simplicity, small footprint, and fast execution make it ideal for configuration, scripting, and rapid prototyping in resource-constrained environments.