std::deque<T,Allocator>::size
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std::deque
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deque::size
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size_type size() const;
(noexcept since C++11) (constexpr since C++26)
Returns the number of elements in the container.
Contents
[edit] Return value
std::distance (begin(), end())
[edit] Complexity
Constant.
[edit] Example
The following code uses size to display the number of elements in a std::deque :
Run this code
#include <deque> #include <iostream> int main() { std::deque <int> nums{1, 3, 5, 7}; std::cout << "nums contains " << nums.size() << " elements.\n"; }
Output:
nums contains 4 elements.