std::array::rbegin, std::array::crbegin
From cppreference.com
                    
                                        
                    
                    
                                                            
                    
| reverse_iterator rbegin(); | (until C++17) | |
| constexpr reverse_iterator rbegin(); | (since C++17) | |
| const_reverse_iterator rbegin() const; | (until C++17) | |
| constexpr const_reverse_iterator  rbegin() const; | (since C++17) | |
| const_reverse_iterator crbegin() const; | (until C++17) | |
| constexpr const_reverse_iterator crbegin() const; | (since C++17) | |
Returns a reverse iterator to the first element of the reversed container. It corresponds to the last element of the non-reversed container.
| Contents | 
[edit] Parameters
(none)
[edit] Return value
Reverse iterator to the first element.
[edit] Exceptions
noexcept specification:  
noexcept
  [edit] Complexity
Constant.
[edit] See also
| returns a reverse iterator to the end (public member function) | 


