public member function
<list>

std::list::pop_back

void pop_back();
Delete last element
Removes the last element in the list container, effectively reducing the container size by one.

This destroys the removed element.

Parameters

none

Return value

none

Example

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
// list::pop_back
#include <iostream>
#include <list>

int main ()
{
  std::list<int> mylist;
  int sum (0);
  mylist.push_back (100);
  mylist.push_back (200);
  mylist.push_back (300);

  while (!mylist.empty())
  {
    sum+=mylist.back();
    mylist.pop_back();
  }

  std::cout << "The elements of mylist summed " << sum << '\n';

  return 0;
}

In this example, the elements are popped out from the end of the list after they are added up in the sum. Output:
The elements of mylist summed 600

Complexity

Constant.

Iterator validity

Iterators, pointers and references referring to element removed by the function are invalidated.
All other iterators, pointers and reference keep their validity.

Data races

The container is modified.
The last element is modified. Concurrently accessing or modifying other elements is safe.

Exception safety

If the container is not empty, the function never throws exceptions (no-throw guarantee).
Otherwise, it causes undefined behavior.

See also