Discrete structures/Mathematics (Graph-2)

Now after vertices and edges we will be dealing with some more concepts.

Loop- The edge which starts and ends at same node/vertex is called a loop

                                                  

                                 In above figure the edge starts and ends at the same point

Their are two types of graphs based on direction

a) Directed Graph- The graph which has direction in its edges is called directed graph
                                     
                                      The arrowheads shows the direction of the edges

b) Non-directed/Undirected Graph- The graph which has no direction in its edges is called                                                              undirected/non-directed graph.
                                      
                                      Note that here their are no arrowheads in the edges