std::dynarray::size
From cppreference.com
                    
                                        
                    
                    
                                                            
                    
|   size_type size() const; 
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(since {std}) | |
Returns the number of elements in the container, i.e. std::distance(begin(), end()).
Contents | 
[edit] Parameters
(none)
[edit] Return value
The number of elements in the container.
[edit] Exceptions
noexcept specification:  
noexcept
  [edit] Complexity
Constant.
[edit] Example
[edit] See also
|    checks whether the container is empty   (public member function)  | 
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|    returns the maximum possible number of elements   (public member function)  |