Vectors Part 2

Adding Values to the Vector Using push_back()

When you need to add values to your vector, you can use the function push_back(), which will append the new value to the end of the vector. This is helpful when you're collecting data one item at a time like adding grades, temperatures, or any growing list of values.

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

int main() {
    vector<int> numbers;

    numbers.push_back(5); // {5}
    numbers.push_back(10); // {5, 10}
    numbers.push_back(15); // {5, 10, 15}

    for (int i = 0; i < numbers.size(); i++) {
        cout << numbers[i] << " ";
    }

    return 0;
}

OUTPUT:

5 10 15

Inserting a Value Using insert()

The insert() function lets you add a value at any position in the vector. When you insert a value, everything from that position onward is shifted one space to the right to make room.