multimap::size() method in C++ STL

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

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