std::vector<T,Allocator>::pop_back

 

C++

Compiler support

Freestanding and hosted

Language

Standard library

Standard library headers

Named requirements

Feature test macros (C++20)

Language support library

Concepts library (C++20)

Metaprogramming library (C++11)

Diagnostics library

General utilities library

Strings library

Containers library

Iterators library

Ranges library (C++20)

Algorithms library

Numerics library

Localizations library

Input/output library

Filesystem library (C++17)

Regular expressions library (C++11)

Concurrency support library (C++11)

Technical specifications

Symbols index

External libraries

 

Containers library

Sequence

array (C++11)

vector

vector<bool>

deque

forward_list (C++11)

list

Associative

set

multiset

map

multimap

Unordered associative

unordered_set (C++11)

unordered_multiset (C++11)

unordered_map (C++11)

unordered_multimap (C++11)

Adaptors

stack

queue

priority_queue

flat_set (C++23)

flat_multiset (C++23)

flat_map (C++23)

flat_multimap (C++23)

Views

span (C++20)

mdspan (C++23)

Iterator invalidation

Member function table

Non-member function table

 

std::vector

Member types

Member functions

vector::vector

vector::~vector

vector::operator=

vector::assign

vector::assign_range (C++23)

vector::get_allocator

Element access

vector::at

vector::operator[]

vector::front

vector::back

vector::data

Iterators

vector::beginvector::cbegin (C++11)

vector::endvector::cend (C++11)

vector::rbeginvector::crbegin (C++11)

vector::rendvector::crend (C++11)

Capacity

vector::empty

vector::size

vector::max_size

vector::reserve

vector::capacity

vector::shrink_to_fit (DR*)

Modifiers

vector::clear

vector::insert

vector::emplace (C++11)

vector::insert_range (C++23)

vector::erase

vector::push_back

vector::emplace_back (C++11)

vector::append_range (C++23)

vector::pop_back

vector::resize

vector::swap

Non-member functions

std::swap

eraseerase_if (C++20)(C++20)

operator==operator!=operator<operator>operator<=operator>=operator<=> (until C++20)(until C++20)(until C++20)(until C++20)(until C++20)(C++20)

Deduction guides(C++17)

 

void pop_back();		(until C++20)
constexpr void pop_back();		(since C++20)

Removes the last element of the container.

Calling pop_back on an empty container results in undefined behavior.

Iterators (including the end() iterator) and references to the last element are invalidated.

Parameters

(none)

Return value

(none)

Complexity

Constant.

Exceptions

Throws nothing.

Example

Run this code

#include <vector>
#include <iostream>
 
template<typename T>
void print(T const& xs)
{
    std::cout << "[ ";
    for (auto const& x : xs)
        std::cout << x << ' ';
    std::cout << "]\n";
}
 
int main()
{
    std::vector<int> numbers;
 
    print(numbers);
 
    numbers.push_back(5);
    numbers.push_back(3);
    numbers.push_back(4);
 
    print(numbers);
 
    numbers.pop_back();
 
    print(numbers);
}

Output:

[ ]
[ 5 3 4 ]
[ 5 3 ]

See also

push_back

adds an element to the end (public member function)