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Difference between revisions of "cpp/container/list/back"

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Revision as of 19:43, 2 November 2012

[edit template]
 
C++
 
Containers library
 
std::list
Member functions
Non-member functions
(until C++20)(until C++20)(until C++20)(until C++20)(until C++20)
Deduction guides(C++17)
 
reference back();
 (1)
const_reference back() const;
 (2)

Returns a reference to the last element in the container.

Calling back on an empty container causes undefined behavior.

Contents

Parameters

(none)

Return value

Reference to the last element.

Complexity

Constant.

Notes

For a non-empty container c, the expression c.back() is equivalent to *std::prev(c.end()).

Example

Run this code
#include <cassert>
#include <list>
 
int main()
{
    std::list<char> letters{'a', 'b', 'c', 'd'};
    assert(letters.back() == 'd');
}

See also

 access the first element
(public member function) [edit]
(C++11)
 returns a reverse iterator to the beginning
(public member function) [edit]
(C++11)
 returns an iterator to the end
(public member function) [edit]
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