Accessing Vector Elements

In the previous exercise, we learned how to create a vector. Now we'll see how to access individual elements of a vector.

Each element in a vector has its index, which is its position in the vector. Indexes start from zero. This means that the first element has index 0, the second element has index 1, and so on.

Let's look at an example:

std::vector newYearResolutions = {"Write a diary", "Take a falconry course", "Learn to juggle"};

In this example, "Write a diary" is at index 0, "Take a falconry course" is at index 1, "Learn to juggle" is at index 2.

If we want to access the first element in the vector newYearResolutions and print it, we use square brackets with the index of the element we want to access. For example:

std::cout << newYearResolutions[0] << std::endl;
// Prints: Write a diary

Similarly, we can access other elements in the vector and print them:

std::cout << newYearResolutions[1] << std::endl; // Prints: Take a falconry course
std::cout << newYearResolutions[2] << std::endl; // Prints: Learn to juggle

Or we can store the value in a variable:

std::string firstResolution = newYearResolutions[0];