vector data() function in C++ STL

The std::vector::data() is an STL in C++ which returns a direct pointer to the memory array used internally by the vector to store its owned elements.


vector_name data()

Parameters: The function does not accept any parameters.

Return value: The function returns a pointer to the first element in the array which is used internally by the vector.

Below program illustrate the above function:





// C++ program to demonstrate the
// vector::date() function
#include <bits/stdc++.h>
using namespace std;
int main()
    // initialising vector
    vector<int> vec = { 10, 20, 30, 40, 50 };
    // memory pointer pointing to the
    // first element
    int* pos =;
    // prints the vector
    cout << "The vector elements are: ";
    for (int i = 0; i < vec.size(); ++i)
        cout << *pos++ << " ";
    return 0;



The vector elements are: 10 20 30 40 50

Attention reader! Don’t stop learning now. Get hold of all the important DSA concepts with the DSA Self Paced Course at a student-friendly price and become industry ready.

My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using or mail your article to See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.

Article Tags :
Practice Tags :


Please write to us at to report any issue with the above content.