Question

How to get the last element of a vector in C++

Answer 1

#include <iostream>
#include <vector>
 
int main()
{
    std::vector<int> v = { 5, 2, 7, 1, 9, 4 };
  
    std::cout << *prev(v.end()) << std::endl;
    
    auto it = prev(v.end());

    std::cout <<  *it << std::endl;
    
    std::cout << v.at(v.size() - 1);

    return 0;
}
  
  
  
  
/*
run:
  
4
4
4
   
*/

 

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Answer 2

#include <iostream>
#include <vector>
   
int main()
{
    std::vector<int> v = {5, 7, 8, 1, 7, 4, 9};
 
    std::cout << v.back();
 
    return 0;
}
     
     
     
     
/*
run:
     
9
     
*/

 

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