A Tree is a graph that satisfies three simple rules:
Connected: You can get from any node to any other node.
No cycles: There is exactly one path between any two nodes.
nodes means edges.
These three properties are connected. If you have any two of them, you get the third for free. For instance, if a graph is connected and has edges, it cannot have cycles. Trees are the simplest connected graphs. They form the foundation of many data structures and algorithms in computer science.
