unordered_multiset max_size in C++ STL

The max_size() of unordered_multiset takes the maximum number of elements that the unordered_multiset container is able to hold due to system or It gets the maximum size of the controlled sequence. Syntax:

size_type max_size() const;

where size_type is an unsigned integral type. Returns : The member function returns the length of the longest sequence that the object can hold. In short, the maximum number of elements. Below program illustrate the unordered_multiset max_size function :- Example 1: CPP

#include <iostream>
#include <unordered_set>

using namespace std;

int main()
{

    // Define the unordered_set
    unordered_multiset<int> num{ 1, 2, 3, 4, 5, 6 };

    cout << "Maximum size = "
         << num.max_size() << "\n";

    cout << "Current size = "
         << num.size();

    return 0;
}

Complexity : It takes constant(O(1)) time of complexity to perform an operation.