luaL_optstring[-0, +0, v] const char *luaL_optstring (lua_State *L, int arg

lua_gethookcount[-0, +0, –] int lua_gethookcount (lua_State *L); Returns the current hook count.

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lua_isuserdata[-0, +0, –] int lua_isuserdata (lua_State *L, int index); Returns 1 if the value at the given

3.3.7 – Local Declarations Local variables can be declared anywhere inside a block. The declaration can include an initial assignment: stat ::= local

luaL_newlibtable[-0, +1, m] void luaL_newlibtable (lua_State *L, const luaL_Reg l[]); Creates

lua_status[-0, +0, –] int lua_status (lua_State *L); Returns the status of the thread L.

lua_gc[-0, +0, m] int lua_gc (lua_State *L, int what, int data); Controls the garbage collector

debug.traceback ([thread,] [message [, level]]) If message is present but is neither a string nor nil, this function returns message without further

math.deg (x) Converts the angle x from radians to degrees.