lua_pushvalue[-0, +1, –] void lua_pushvalue (lua_State *L, int index); Pushes a copy of the element at the given index onto the stack.

lua_pushstring[-0, +1, m] const char *lua_pushstring (lua_State *L, const char *s); Pushes the zero-terminated string pointed to by s onto the stack. Lua makes (or reuses) an internal copy of the given string, so the memory at s can be freed or reused immediately after the function returns. Returns a pointer to the internal copy of the string. If s is NULL, pushes nil and returns NULL.

lua_pushthread[-0, +1, –] int lua_pushthread (lua_State *L); Pushes the thread represented by L onto the stack. Returns 1 if this thread is the main thread of its state.

lua_pushnumber[-0, +1, –] void lua_pushnumber (lua_State *L, lua_Number n); Pushes a float with value n onto the stack.

lua_pushnil[-0, +1, –] void lua_pushnil (lua_State *L); Pushes a nil value onto the stack.

lua_pushlstring[-0, +1, m] const char *lua_pushlstring (lua_State *L, const char *s, size_t len); Pushes the string pointed to by s with size len onto the stack. Lua makes (or reuses) an internal copy of the given string, so the memory at s can be freed or reused immediately after the function returns. The string can contain any binary data, including embedded zeros. Returns a pointer to the internal copy of the string.

lua_pushliteral[-0, +1, m] const char *lua_pushliteral (lua_State *L, const char *s); This macro is equivalent to lua_pushstring, but should be used only when s is a literal string.

lua_pushlightuserdata[-0, +1, –] void lua_pushlightuserdata (lua_State *L, void *p); Pushes a light userdata onto the stack. Userdata represent C values in Lua. A light userdata represents a pointer, a void*. It is a value (like a number): you do not create it, it has no individual metatable, and it is not collected (as it was never created). A light userdata is equal to "any" light userdata with the same C address.

lua_pushglobaltable[-0, +1, –] void lua_pushglobaltable (lua_State *L); Pushes the global environment onto the stack.

lua_pushinteger[-0, +1, –] void lua_pushinteger (lua_State *L, lua_Integer n); Pushes an integer with value n onto the stack.