set size in c++

Set Size in C++

#include <iostream>
#include <set>

int main() {
    std::set<int> mySet;
    mySet.insert(3);
    mySet.insert(1);
    mySet.insert(4);
    mySet.insert(1);

    std::cout << "Size of set: " << mySet.size() << std::endl;

    return 0;
}

• Include necessary libraries: #include <iostream> and #include <set>
• Create a set of integers: std::set<int> mySet;
• Insert elements into the set using insert(): mySet.insert(3);, mySet.insert(1);, mySet.insert(4);, mySet.insert(1);
• Retrieve the size of the set using size(): mySet.size()
• Output the size of the set using std::cout << "Size of set: " << mySet.size() << std::endl;