What are vectors in C++ and how do I use them?

What are vectors in C++ and how do I use them?

Vectors in C++ are dynamic arrays that can grow in size. They are part of the Standard Template Library (STL). You can use them to store a collection of elements.

How do I declare a vector?

You can declare a vector by including the header <vector> and using the syntax: std::vector<int> myVector; for an integer vector.

Can you show me how to add elements to a vector?

Sure! You can add elements using the push_back() method. For example: myVector.push_back(10); adds the value 10 to the end of the vector.

What about accessing elements in a vector?

You can access elements using the index operator. For example, myVector[0] gives you the first element.

Are there any important functions I should know?

Yes! Some important functions include size(), empty(), and clear(). They help you manage the vector's size and contents.