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
| (none) | (until C++11) |
noexcept specification: noexcept | (since C++11) |
Complexity
Constant.
Example
The following code uses size to display the number of elements in a std::multiset:
#include <set>
#include <iostream>
int main()
{
std::multiset<int> nums {1, 3, 5, 7};
std::cout << "nums contains " << nums.size() << " elements.\n";
}Output:
nums contains 4 elements.
See also
| checks whether the container is empty (public member function) | |
| returns the maximum possible number of elements (public member function) |
Please login to continue.