array::cbegin() and array::cend() in C++ STL

1. array::cbegin() is a built-in function in C++ STL which returns a const_iterator pointing to the first element in the array. It cannot be used to modify the element in the array which is possible using array::begin().

   Syntax:

   array_name.cbegin() 

   Parameters: The function does not accept any parameters.

   Return Value: The function returns a const_iterator pointing to the first element in the array.

   Program 1:

   // CPP program to illustrate
   // the array::cbegin() function
   #include <bits/stdc++.h>
   using namespace std;
   
   int main()
   {
       array<int, 5> arr = { 1, 5, 2, 4, 7 };
   
       // Prints the first element
       cout << "The first element is " << *(arr.cbegin()) << "\n";
   
       // Print all the elements
       cout << "The array elements are: ";
       for (auto it = arr.cbegin(); it != arr.cend(); it++)
           cout << *it << " ";
       return 0;
   }
   Output:

   The first element is 1
   The array elements are: 1 5 2 4 7
   

2. array::cend() is a built-in function in C++ STL which returns a const_iterator pointing to the theoretical element after the last element in an array.

   Syntax:

   array_name.cend() 

   Parameters: The function does not accept any parameters.

   Return Value: The function returns a const_iterator pointing to the theoretical element after the last element in an array.

   Program 1:

   // CPP program to illustrate
   // the array::cend() function
   #include <bits/stdc++.h>
   using namespace std;
   
   int main()
   {
       array<int, 5> arr = { 1, 5, 2, 4, 7 };
   
       // prints all the elements
       cout << "The array elements are: ";
       for (auto it = arr.cbegin(); it != arr.cend(); it++)
           cout << *it << " ";
       return 0;
   }
   Output:

   The array elements are: 1 5 2 4 7