In this chapter, we have introduced graphs, formalized what they are and shown two different ways to represent them in computer programs. Afterwards, we took a look at ways of traversing graphs, using them as building blocks for building more complex algorithms on top. Then, we looked at two different algorithms for finding shortest paths in a graph.

At the end of this book, we provide pointers for curious students to study on their own. The world of data structures and algorithms is vast and requires a type of mathematical reasoning for which some study and practice is required. However, one of the most rewarding feelings in the life of a software engineer is coming up with a clever algorithms to solve a complex problems.