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std::basic_string_view<CharT,Traits>::back - cppreference.com

From cppreference.com

constexpr const_reference back() const;
(since C++17)

Returns reference to the last character in the view.

If empty() is true, the behavior is undefined.

(until C++26)

If empty() is true:

(since C++26)

Return value

data_[size() - 1]

Complexity

Constant.

Example

#include <iostream>
#include <string_view>
 
int main()
{
    for (std::string_view str{"ABCDEF"}; !str.empty(); str.remove_suffix(1))
        std::cout << str.back() << ' ' << str << '\n';
}

Output: 

F ABCDEF
E ABCDE
D ABCD
C ABC
B AB
A A

See also

accesses the first character
(public member function) [edit]
checks whether the view is empty
(public member function) [edit]
accesses the last character
(public member function of std::basic_string<CharT,Traits,Allocator>) [edit]