std::set<Key,Compare,Allocator>::size
From cppreference.com
size_type size() const;
|
(noexcept since C++11) | |
Returns the number of elements in the container, i.e. std::distance(begin(), end()).
Return value
The number of elements in the container.
Complexity
Constant.
Example
Run this code
#include <cassert>
#include <set>
int main()
{
std::set<int> nums{4, 2, 4, 2};
assert(nums.size() == 2);
}
See also
| checks whether the container is empty (public member function) | |
| returns the maximum possible number of elements (public member function) | |
(C++17)(C++20) |
returns the size of a container or array (function template) |
