> Is it specified anywhere what, exactly, the '*n' format is supposed to > read? The same as fscanf with %lf. See the source: http://www.lua.org/source/5.2/liolib.c.html#read_number http://www.lua.org/source/5.2/luaconf.h.html#LUA_NUMBER_SCAN called from http://www.lua.org/source/5.2/liolib.c.html#g_read