Multimaps are associative containers available in the C++ Standard Library. They are similar to a map with an addition that multiple elements can have the same keys. The multimap::size()
is a method available in the STL that returns the number of elements present in the multimap.
Syntax:
map_name.size();
Parameters: The multimap::size()
does not accept any parameter:
Return value: size of container
Example of multimap::size() method
#include<iostream> #include<map> using namespace std; int main() { multimap<char,int> m; m.insert( pair<int,int> ('a',1) ); m.insert( pair<int,int> ('b',2) ); m.insert( pair<int,int> ('c',3) ); cout<<"Size of container: "<<m.size(); }
Output:
Size of container: 3