Lua

What is Lua? Why appear messages of errors in console with "lua"?

All garry's mod is coding in .lua, addons, weapon, vehicle... first you add model, second texture and for finish you code for say this texture go with this model, this appair ingame in the weapon catgorie, the name, the icon and for finish all action.

lua is one of the best programming langs out there no need to program dumps it does it by its self and soooooo simple man

i wanna learn lua if anyone knows anything about it or can hmu with some videos much love!!!!