std::array::front(3) C++ Standard Libary std::array::front(3) NAME std::array::front - std::array::front Synopsis reference front(); (1) (since C++11) (constexpr since C++17) const_reference front() const; (2) (since C++11) (constexpr since C++14) Returns a reference to the first element in the container. Calling front on an empty container causes undefined behavior. Parameters (none) Return value Reference to the first element. Complexity Constant. Notes For a container c, the expression c.front() is equivalent to *c.begin(). Example The following code uses front to display the first element of a std::ar- ray<char, 6>: // Run this code #include <array> #include <iostream> int main() { std::array<char, 6> letters{'a', 'b', 'c', 'd', 'e', 'f'}; if (!letters.empty()) std::cout << "The first character is '" << letters.front() << "'.\n"; } Output: The first character is 'a'. See also back access the last element (public member function) http://cppreference.com 2024.06.10 std::array::front(3)
NAME | Synopsis | Parameters | Return value | Complexity | Notes | Example | Output: | See also
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