Multisets are associative containers available in the C++ Standard Library. They are similar to sets with an addition that multiple keys with equivalent values are allowed. The multiset::size() is a method available in the STL that returns the number of elements present in the multiset.
Syntax:
set_name.size();
Parameters: The multiset::size() does not accept any parameter:
Return value: size of container
Example of multiset::size() method
#include <iostream>
#include <set>
using namespace std;
int main()
{
multiset<int> m;
m.insert(1);
m.insert(2);
m.insert(3);
m.insert(4);
cout<<"Size: "<<m.size()<<endl;
}
Output:
Size: 4
