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C++ Array Crend

The C++ std::array::crend() function is used to return a constant reverse iterator pointing to the element preceding the first element of the array. This function is used to traverse the array in reverse order without modifying its element.

The crend() function is typically used in conjunction with crbegin() to create a reverse iteration range.

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

const_reverse_iterator crend() const noexcept;

None

It returns a reverse constant iterator pointing to the past-end element of 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 crend() function.

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

Output of the above code is as follows −

50 40 30 20 10

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

#include <iostream>
#include <array>
using namespace std;
int main() {
   array < string, 3 > MyArray {"Tutorials","point","company"};
   array < string, 3 > ::const_reverse_iterator crit;
   crit = MyArray.crend();
   crit--;
   cout << * crit << " ";
   crit--;
   cout << * crit << " ";
   crit--;
   cout << * crit << " ";
   return 0;
}

Following is the output of the above code −

Tutorials point company

array.htm

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