arg = {...} if #arg == 0 then print("Usage: random ") return exit end all = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ" e = "" for i = 1, tonumber(arg[1]) do r = math.random(#all) e = e.. string.sub(all, r, r) end print(e)