Lua

Lua 5.1.4 is the current programming language used on ROBLOX. Lua uses lines of code to tell the game what to do at a certain time or place. Robloxians call this scripting. Using Lua can be hard or easy depending on your scripting skills. On August 3rd 2012, the bytecode from Lua has been removed due to exploiting and able to hack into the Lua scripts in a public server.