deque_name.push_front(element);
#include#include using namespace std; int main() { deque mydeque{ 10, 20, 30 }; // Inserting elements at the front of deque mydeque.push_front(5); mydeque.push_front(15); // Displaying elements of deque for (int i : mydeque) cout << i << " "; return 0; }
15 5 10 20 30In the above example, we have created a deque named "mydeque" with three elements. We have then inserted two new elements at the beginning using push_front() function and finally displayed all the elements of deque using a loop. The push_front() function is part of the Standard Template Library (STL) package in C++.