C++ Vector crend
This function is used to point the element preceding the first element in the vector container. Itrefers as reverse end.
Syntax
Consider a vector 'v'. Syntax would be:
Example
const_reverse_iterator itr=v.crend();
Parameter
It does not contain any parameter.
Return value
It returns the constant reverse iterator pointing to the reverse end in the sequence.
Example 1
Let's see a simple example.
Example
#include <iostream>
#include<vector>
using namespace std;
int main()
{
vector<int> v{1,2,3,4,5};
vector<int>::const_reverse_iterator itr=v.crend()-2;
*itr=9;
cout<<*itr;
return 0;
}
In this example, it shows that crend() function does not modify the value otherwise, it shows an error.
Example 2
Let's see a another simple example
Example
#include <iostream>
#include<vector>
using namespace std;
int main()
{
vector<string>str{"java","C","C++",".Net"};
vector<string>::const_reverse_iterator itr=str.crend()-1;
std::cout<< *itr;
return 0;
}
Output:
In this example, crend function access the first element of the vector container.