size of set c++

#include <iostream>
#include <set>

int main() {
    std::set<int> mySet;

    mySet.insert(10);
    mySet.insert(20);
    mySet.insert(30);
    mySet.insert(40);
    mySet.insert(50);

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

    return 0;
}

Explanation:

• #include <iostream>: Includes the input-output stream header file, which allows input and output operations.
• #include <set>: Includes the header file for the set container in C++.
• std::set<int> mySet;: Declares a set named mySet that stores integers.

Inside the main() function: - mySet.insert(10);, mySet.insert(20);, mySet.insert(30);, mySet.insert(40);, mySet.insert(50);: Inserts integers 10, 20, 30, 40, and 50 into the set mySet. - std::cout << "Size of set: " << mySet.size() << std::endl;: Outputs the size of the set mySet using mySet.size(). This function returns the number of elements present in the set.

• return 0;: Indicates successful termination of the main() function.