C++ Vector rend
The rend function represents 'reverse end' and is employed to reference the element before the initial element in the vector.
Syntax
Consider a vector 'v'. Syntax would be:
Example
reverse_iteratorritr=v.rend();
Parameter
It does not contain any parameter.
Return value
It yields a reverse iterator indicating the opposite end of the vector container.
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>::reverse_iterator ritr;
for(ritr=v.rbegin();ritr!=v.rend();ritr++)
std::cout<< *ritr<<" ";
return 0;
}
Output:
Output
5 4 3 2 1
In this instance, the rend function is employed to retrieve the reverse integer values stored within the vector.
Example 2
Let's see a simple example.
Example
#include <iostream>
#include<vector>
using namespace std;
int main()
{
vector<string> v{"Computer science","electronics","electrical","mechanical"};
vector<string>::reverse_iterator ritr;
vector<string>::iterator itr;
std::cout<<"Strings are :";
for(itr=v.begin();itr!=v.end();itr++)
cout<<*itr<<", ";
cout<<'\n';
cout<<"Reverse strings are :";
for(ritr=v.rbegin();ritr!=v.rend();ritr++)
cout<<*ritr<<", ";
return 0;
}
Output:
Output
Strings are :Computer science, electronics, mechanical
Reverse strings are :mechanical, electrical, electronics, Computer science
In this instance, the rend method is employed to retrieve reverse string values stored within the vector.
