empty the vector

1//C++ STL program to demonstrate example of
2//vector::empty() function
3
4#include <iostream>
5#include <vector>
6using namespace std;
7
8int main()
9{
10    vector<int> v1;
11
12    //printing the size of the vector
13    cout << "Total number of elements: " << v1.size() << endl;
14    //checking whether vector is empty or not
15    if (v1.empty())
16        cout << "vector is empty." << endl;
17    else
18        cout << "vector is not empty." << endl;
19
20    //pushing elements
21    v1.push_back(10);
22    v1.push_back(20);
23    v1.push_back(30);
24    v1.push_back(40);
25    v1.push_back(50);
26
27    //printing the size of the vector
28    cout << "Total number of elements: " << v1.size() << endl;
29    //checking whether vector is empty or not
30    if (v1.empty())
31        cout << "vector is empty." << endl;
32    else
33        cout << "vector is not empty." << endl;
34
35    return 0;
36}
37

1return vector<int>();
2//or
3return{};