public member function
<array>

std::array::begin

      iterator begin() noexcept;
const_iterator begin() const noexcept;
Return iterator to beginning
Returns an iterator pointing to the first element in the array container.

Notice that, unlike member array::front, which returns a reference to the first element, this function returns a random access iterator pointing to it.

In zero-sized arrays, this function returns the same as array::end, but the returned iterator should not be dereferenced.

Parameters

none

Return Value

An iterator to the beginning of the sequence.

If the array object is const-qualified, the function returns a const_iterator. Otherwise, it returns an iterator.

Member types iterator and const_iterator are random access iterator types (pointing to an element and to a const element, respectively).

Example

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// array::begin example
#include <iostream>
#include <array>

int main ()
{
  std::array<int,5> myarray = { 2, 16, 77, 34, 50 };

  std::cout << "myarray contains:";
  for ( auto it = myarray.begin(); it != myarray.end(); ++it )
    std::cout << ' ' << *it;
  std::cout << '\n';

  return 0;
}


Output:
myarray contains: 2 16 77 34 50

Complexity

Constant.

Iterator validity

No changes.

Data races

No contained elements are accessed by the call, but the iterator returned can be used to access or modify elements. Concurrently accessing or modifying different elements is safe.

Exception safety

No-throw guarantee: this member function never throws exceptions.
The copy construction or assignment of the returned iterator is also guaranteed to never throw.

See also

  • 1793521592 2018-02-23
  • 2864591591 2018-02-23
  • 6167231590 2018-02-23
  • 3669201589 2018-02-23
  • 7946381588 2018-02-23
  • 8957701587 2018-02-23
  • 3891941586 2018-02-23
  • 6039851585 2018-02-23
  • 2573991584 2018-02-23
  • 7728781583 2018-02-23
  • 3731582 2018-02-23
  • 1007451581 2018-02-22
  • 8908121580 2018-02-22
  • 141161579 2018-02-22
  • 9421578 2018-02-22
  • 2826901577 2018-02-22
  • 3647361576 2018-02-22
  • 5717551575 2018-02-22
  • 523811574 2018-02-22
  • 6439871573 2018-02-22