In C++, the standard library gives us the facility to use the Queues as a type of container adaptors which operate in a first in first out (FIFO) type of arrangement. The queue::back() is a C++ Standard Library function which is used to get the last element of a queue.
Syntax
Queue_Name.back( );
Parameter: The queue::back() function does not accepts any parameter.
Return value: The queue::back() function returns the reference the last element of the queue container.
Example of queue::back() Function
#include <iostream>
#include <queue>
using namespace std;
int main()
{
queue<int> QUE;
QUE.push(1);
QUE.push(4);
QUE.push(3);
QUE.push(7);
cout << QUE.back();
return 0;
} Output
7
