What does vector insert do in C++?

vector insert() function in C++ STL std::vector::insert() is a built-in function in C++ STL which inserts new elements before the element at the specified position, effectively increasing the container size by the number of elements inserted.

How do you add to a vector in C++?

Modifiers:

assign() – It assigns new value to the vector elements by replacing old ones.
push_back() – It push the elements into a vector from the back.
pop_back() – It is used to pop or remove elements from a vector from the back.
insert() – It inserts new elements before the element at the specified position.

How do you add a vector?

Using the insert() Function on Vectors

Insert a single value into a Vector. We can directly pass an iterator pointing to our desired position and the value to be inserted there to the insert() function to modify a vector.
Insert the same value Multiple times.
Insert Another Vector.

How do you vector vector and push?

Insertion in Vector of Vectors Elements can be inserted into a vector using the push_back() function of C++ STL. Below example demonstrates the insertion operation in a vector of vectors. The code creates a 2D vector by using the push_back() function and then displays the matrix.

How do you vector vector a push?

What is pop back in C++?

The list::pop_back() is a built-in function in C++ STL which is used to remove an element from the back of a list container. That is, this function deletes the last element of a list container. This function thus decreases the size of the container by 1 as it deletes an element from the end of list.