local player = {name = "John", hp = 100, pos = {x = 0, y = 0}} function move(p, dx, dy) p.pos.x += dx; p.pos.y += dy end move(player, 5, -3) local inv = {"sword", "potion", "key"} for i, item in ipairs(inv) do print(i .. ": " .. item) end local sum = 0 for i = 1, 100 do sum = sum + i end if sum > 1000 then print("big") else print("small") end local function len(t) local c = 0; for _ in pairs(t) do c = c + 1 end; return c end print("inv size = " .. len(inv)) setmetatable(player, { __tostring = function(p) return p.name .. " (" .. p.hp .. ")" end }) print(player)