If a path is Simple Path, and it starts and ends at the same vertex, then the path is a CYCLE. A Cycle is like a circle; it starts at one point and ends at the same point.
It is important to note that the same edge cannot be used more than once in a cycle.
A graph is called ACYCLIC if there are no cycles in it.
In the first example, the path {CDEGJIFC} is a cycle.
The second graph does not contain cycles.