std::array data() method

since C++17

// Non-const version
constexpr T* data() noexcept;

// Const version
constexpr const T* data() const noexcept;

until C++17

// Non-const version
T* data() noexcept;

// Const version
const T* data() const noexcept;

Returns pointer to the underlying array serving as element storage. The pointer is such that range [ data(); data() + size() ) is always a valid range, even if the container is empty (data() is not dereferenceable in that case).

Parameters

(none)

Return value

Pointer to the underlying element storage. For a non-empty container c, the returned pointer compares equal to the address of the first element - c.data() == &c[0];

Complexity

Constant.

Notes

If size() is 0, data() may or may not return a null pointer.

Example

Main.cpp

#include <array>
#include <iostream>
 
int main()
{
    std::array<char, 6> letters {'a', 'b', 'c', 'd', 'e', 'f'};
 
    if (!letters.empty()) {
        std::cout << "The last character is '" << letters.back() << "'.\n";
    }  
}

Possible output

The last character is 'f'.