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Printing all elements in reverse order of a vector in C++ STL

C++ STL | printing all elements of a vector in reverse order: Here, we are going to learn how to print all elements of a vector in reverse order using vector::begin() and vector::end() function in C++ STL?
Submitted by IncludeHelp, on May 09, 2019

Printing all elements of a vector in reverse order

To print all elements of a vector in reverse order, we can use two functions 1) vector::begin() and vector::end() functions.

vector::begin() function returns an iterator pointing to the first elements of the vector.

vector::end() function returns an iterator point to past-the-end element of the vector.

We run a loop from past-the-element to the first elements of the vector elements.

Note: To use vector, include <vector> header.

C++ STL program to print all elements of a vector in reverse order

//C++ STL program to print all elements 
//of a vector in reverse order
#include <iostream>
#include <vector>
using namespace std;

int main()
{
    vector<int> v1;

    v1.push_back(10);
    v1.push_back(20);
    v1.push_back(30);
    v1.push_back(40);
    v1.push_back(50);

    //creating iterator
    vector<int>::iterator it;

    //printing all elements
    cout << "vector v1 elements are in reverse order : " << endl;
    for (it = v1.end() - 1; it >= v1.begin(); it--)
        cout << *it << " ";
    cout << endl;

    return 0;
}

Output

vector v1 elements are in reverse order :
50 40 30 20 10