Accessing the Last Element in a Deque in C++
To access the last element of a std::deque in C++, we can use the std::deque::back() member function which returns a reference to the last element of the deque. This function is suitable for accessing and manipulating the last element without modifying the deque’s structure.
Syntax to Use std::back
dequeName.back();
C++ Program to Access the Last Element of a Deque
The below program demonstrates how we can access the last element of a deque in C++.
// C++ program to demonstrate how to access the last element
// of a deque
#include <deque>
#include <iostream>
using namespace std;
int main()
{
// Initializing a new deque
deque<int> myDeque = { 1, 2, 3, 4, 5 };
// Using back() function to retrieve the last element
int lastElement = myDeque.back();
// Printing the last element
cout << "The last element is: " << lastElement << endl;
return 0;
}
Output
The last element is: 5
Time Complexity: O(1)
Auxilliary Space: O(1)
How to Access the Last Element of a Deque in C++?
In C++ STL, we have a deque container which is a double-ended queue that allows us to add or remove elements from both ends. In this article, we will learn how to access the last element in a deque in C++.
For Example,
Input:
myDeque = {1, 2, 3, 4, 5, 6}
Output:
Last Element: 6
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