# std::basic_string_view<CharT,Traits>::back

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< cpp‎ | string‎ | basic string view

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

Returns reference to the last character in the view. The behavior is undefined if empty() == true.

### Parameters

(none)

### Return value

Reference to the last character, equivalent to operator[](size() - 1).

### Complexity

Constant.

### Example

Run this code

    #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

front (C++17) | accesses the first character (public member function)
empty (C++17) | checks whether the view is empty (public member function)
back (DR*) | accesses the last character (public member function of `std::basic_string<CharT,Traits,Allocator>`)

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