std::vector::size

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Containers library
array (C++11) vector deque forward_list (C++11) list set multiset map multimap unordered_set (C++11) unordered_multiset (C++11) unordered_map (C++11) unordered_multimap (C++11) stack queue priority_queue
std::vector
Member functions vector::vector vector::~vector vector::operator= vector::assign vector::get_allocator Element access vector::at vector::operator[] vector::front vector::back vector::data Iterators vector::begin vector::cbegin (C++11) vector::end vector::cend (C++11) vector::rbegin vector::crbegin (C++11) vector::rend vector::crend (C++11) Capacity vector::empty vector::size vector::max_size vector::reserve vector::capacity vector::shrink_to_fit (C++11) Modifiers vector::clear vector::insert vector::emplace (C++11) vector::erase vector::push_back vector::emplace_back (C++11) vector::pop_back vector::resize vector::swap

size_type size() const;

Returns the number of elements in the container, i.e. std::distance(begin(), end()).

Parameters

(none)

Return value

the number of elements in the container

Exceptions

noexcept specification:  

noexcept

  (since C++11)

Complexity

Constant

See also

capacity	returns the number of elements that can be held in currently allocated storage (public member function)
empty	checks whether the container is empty (public member function)
max_size	returns the maximum possible number of elements (public member function)
resize	changes the number of elements stored (public member function)