luaL_checkoption[-0, +0, v] int luaL_checkoption (lua_State *L, int arg,

math.sqrt (x) Returns the square root of x. (You can also use the expression x^0.5 to compute this value.)

file:flush () Saves any written data to file.

lua_getglobal[-0, +1, e] int lua_getglobal (lua_State *L, const char *name); Pushes onto the stack

lua_isnone[-0, +0, –] int lua_isnone (lua_State *L, int index); Returns 1 if the given index is not valid

luaL_loadfile[-0, +1, m] int luaL_loadfile (lua_State *L, const char *filename); Equivalent to

lua_rawsetp[-1, +0, m] void lua_rawsetp (lua_State *L, int index, const void *p); Does the equivalent

string.byte (s [, i [, j]])s[i]s[i+1]s[j]iji

math.cos (x) Returns the cosine of x (assumed to be in radians).

luaL_pushresult[-?, +1, m] void luaL_pushresult (luaL_Buffer *B); Finishes the use of buffer B