A RetroSearch Logo

Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Search Query:

Showing content from https://cplusplus.com/reference/array/array/begin/ below:

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 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
// 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 safetyNo-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
array::cbegin
Return const_iterator to beginning (public member function)
array::front
Access first element (public member function)
array::end
Return iterator to end (public member function)
array::rbegin
Return reverse iterator to reverse beginning (public member function)
array::rend
Return reverse iterator to reverse end (public member function)

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4