# std::get(std::array)

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< cpp‎ | container‎ | array

Defined in header `<array>` |  |
template< std::size_t I, class T, std::size_t N > T& get( std::array <T,N>& a ) noexcept; | (1) | (since C++11) (constexpr since C++14)
template< std::size_t I, class T, std::size_t N > T&& get( std::array <T,N>&& a ) noexcept; | (2) | (since C++11) (constexpr since C++14)
template< std::size_t I, class T, std::size_t N > const T& get( const std::array <T,N>& a ) noexcept; | (3) | (since C++11) (constexpr since C++14)
template< std::size_t I, class T, std::size_t N > const T&& get( const std::array <T,N>&& a ) noexcept; | (4) | (since C++11) (constexpr since C++14)

Extracts the `I`th element from the array using tuple-like interface.

`I` must be an integer value in range `[`​0​`,` N`)`. This is enforced at compile time as opposed to at() or operator[].

### Parameters

a | - | array whose contents to extract

### Return value

A reference to the `I`th element of a.

### Complexity

Constant.

### Example

Run this code

    #include <array>
    #include <iostream>

    constexpr std::array v{1, 2, 3};
    static_assert(get<0>(v) == 1 && get<1>(v) == 2 && get<2>(v) == 3);

    int main()
    {
        std::array<int, 3> a;

        // set values:
        get<0>(a) = 1, get<1>(a) = 2, get<2>(a) = 3;

        // get values:
        std::cout << '(' << get<0>(a) << ',' << get<1>(a) << ',' << get<2>(a) << ")\n";
    }

Output:

    (1,2,3)

### Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR | Applied to | Behavior as published | Correct behavior
--- | --- | --- | ---
LWG 2485 | C++11 | there are no overloads for const array&& | the overloads are added

### See also

Structured binding (C++17) | binds the specified names to sub-objects or tuple elements of the initializer
operator[] | access specified element (public member function)
at | access specified element with bounds checking (public member function)
get(std::tuple) (C++11) | tuple accesses specified element (function template)
get(std::pair) (C++11) | accesses an element of a `pair` (function template)
get(std::variant) (C++17) | reads the value of the variant given the index or the type (if the type is unique), throws on error (function template)
get(std::ranges::subrange) (C++20) | obtains iterator or sentinel from a std::ranges::subrange (function template)
get(std::complex) (C++26) | obtains a reference to real or imaginary part from a std::complex (function template)

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