How to Add Multiple Elements to a Set in C++?

In C++, a set is a container that stores the unique elements in a sorted order. In this article, we will learn how to add multiple elements to a set in C++.

For Example,

Input:
mySet = {1, 5, 6, 7, 8}
Elements to add: {1, 2, 3, 4, 5}

Output:
Set Elements are: 1 2 3 4 5

Insert Multiple Elements in a Set in C++

To add multiple elements to a std::set in one go, we can pass an initializer list of elements in the std::set::insert() function using the below syntax:

Syntax to Insert Multiple Elements in Set

setName.insert({elem1,elem2,elem3,elem4});

C++ Program to Add Multiple Elements to a Set

The below example demonstrates the use of the initializer list and insert() function to add multiple elements in a set.

C++

// C++ program to add multiple elements in a set
#include <iostream>
#include <set>
using namespace std;

int main()
{
    set<int> mySet;

    // Adding multiple elements using insert and initializer
    // list
    mySet.insert({ 10, 20, 30, 40, 50 });

    // Displaying the set
    cout << "Elements in set are:" << endl;
    for (const auto& element : mySet) {
        cout << element << " ";
    }

    return 0;
}

Output

Elements in set are:
10 20 30 40 50 

Time Complexity: O(n log(n)), here n is the number of elements to be inserted in the set.
Auxilliary Space: O(n)