STL(standard template library) - Iterations in C++

 Example of vector:

#include<iostream>

#include<vector>

using namespace std;

int main()

{

//sequence container 

vector<int> v;

v.push_back(10);

v.push_back(20);

v.push_back(40);

v.push_back(50);

v.push_back(22);

v.push_back(10);

cout<<"size => "<<v.size()<<endl;

v.clear();

cout<<"size => "<<v.size()<<endl;

return 0;

}

output:

size => 6

size => 0