C++ Vector – Remove First Element

To remove first element of a vector, you can use erase() function. Pass iterator to first element of the vector as argument to erase() function.

Example – Remove or Delete First Element of Vector

In the following example, we have defined a vector and initialized with some values. We shall use erase() to remove the first element.

C++ Program

#include <iostream>
#include <vector>
using namespace std;

int main() {
   vector<int> nums;
   nums.push_back(6);
   nums.push_back(2);
   nums.push_back(7);
   nums.push_back(1);   
     
   nums.erase(nums.begin());

   for (int num: nums)
      cout << num << endl;
}

Output

2
7
1

Conclusion

In this C++ Tutorial, we learned how to remove the first element of the vector.