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Showing content from https://www.tutorialspoint.com/cpp_standard_library/cpp_array_end.htm below:

C++ Array end() Function

The C++ std::array::end() function is used to return an iterator pointing to the element following the last element of the array. This iterator does not point to a valid element but points the end of the array, making it useful for traversing or iterating through the array using loops.

Following is the syntax for std::array::end() function.

iterator end() noexcept;
const_iterator end() const noexcept;

It does not accepts any parameter.

It returns an iterator pointing to the past-the-end element in the array.

This function never throws exception.

Constant i.e. O(1)

In the following example, we are going to consider the basic usage of the end() function.

#include <iostream>
#include <array>
using namespace std;
int main(void) {
   array < int, 5 > arr = {10,20,30,40,50};
   auto start = arr.begin();
   auto end = arr.end();
   while (start < end) {
      cout << * start << " ";
      ++start;
   }
   cout << endl;
   return 0;
}

Output of the above code is as follows −

10 20 30 40 50 

Consider the following example, where we are going to apply end() function on the character array.

#include <iostream>
#include <array>
using namespace std;
int main() {
   array < char, 5 > MyArray {'P','R','A','S','U'};
   array < char, 5 > ::iterator it;
   for (it = MyArray.begin(); it != MyArray.end(); ++it)
      cout << * it << " ";
   return 0;
}

Following is the output of the above code −

P R A S U

Let's look at the following example, where we are going to consider the string array and applying the end() function.

#include <iostream>
#include <array>
using namespace std;
int main() {
   array < string, 2 > MyArray {"Tutorials","point"};
   array < string, 2 > ::iterator it;
   it = MyArray.end();
   it--;
   cout << * it << " ";
   it--;
   cout << * it << " ";
   return 0;
}

If we run the above code it will generate the following output −

point Tutorials 

array.htm

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