std::unordered_set<Key,Hash,KeyEqual,Allocator>::size - cppreference.com
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(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
#include <cassert> #include <unordered_set> int main() { std::unordered_set<int> nums{4, 2, 4, 2}; assert(nums.size() == 2); }
See also
| checks whether the container is empty (public member function) [edit] | |
| returns the maximum possible number of elements (public member function) [edit] | |
| returns the size of a container or array (function template) [edit] |