NAME¶

std::map::rbegin,std::map::crbegin - std::map::rbegin,std::map::crbegin

Synopsis¶

reverse_iterator rbegin(); (until C++11)
reverse_iterator rbegin() noexcept; (since C++11)
const_reverse_iterator rbegin() const; (until C++11)
const_reverse_iterator rbegin() const noexcept; (since C++11)
const_reverse_iterator crbegin() const noexcept; (since C++11)

Returns a reverse iterator to the first element of the reversed map. It corresponds
to the last element of the non-reversed map. If the map is empty, the returned
iterator is equal to rend().

range-rbegin-rend.svg

Parameters¶

(none)

Return value¶

Reverse iterator to the first element.

Complexity¶

Constant.

Example¶

// Run this code

#include <iomanip>
#include <iostream>
#include <map>
#include <string_view>

int main()
{
const std::map<int, std::string_view> coins {
{10, "dime"},
{100, "dollar"},
{50, "half dollar"},
{5, "nickel"},
{1, "penny"},
{25, "quarter"}
}; // initializer entries in name alphabetical order
std::cout << "US coins in circulation, largest to smallest denomination:\n";
for (auto it = coins.crbegin(); it != coins.crend(); ++it) {
std::cout << std::setw(11) << it->second << " = ¢" << it->first << '\n';
}
}

Output:¶

US coins in circulation, largest to smallest denomination:
dollar = ¢100
half dollar = ¢50
quarter = ¢25
dime = ¢10
nickel = ¢5
penny = ¢1

See also¶

rend returns a reverse iterator to the end
crend (public member function)
(C++11)
rbegin returns a reverse iterator to the beginning of a container or array
crbegin (function template)
(C++14)