4 Graph Types: Undirected vs Directed, Weighted vs Unweighted

In this video we break down the four main types of graphs used in computer science: undirected unweighted, undirected weighted, directed unweighted, and directed weighted.

We start with the basic idea of graphs - collections of nodes (vertices) and edges - and then explore each type with clear examples. Learn how these graphs represent real-world relationships like computer networks, airport routes, road maps, and game maps.

Perfect for anyone learning data structures, algorithms, or preparing for coding interviews.

00:00 Introduction to Graphs
00:19 Basic Graph Definition
00:48 Nodes and Vertices
01:01 Empty Graph Example
01:17 Graph Implementation Concepts
02:02 Node Data and Templates
03:22 Adding Nodes
04:00 Adding Edges
04:44 What Graphs Represent
05:36 Graph Use Cases
06:56 Real-World Examples
08:35 Four Types of Graphs
08:52 Undirected Unweighted Graph
10:40 Unweighted as Unit Weights
11:40 Undirected Weighted Graph
13:32 Weighted Graph Benefits
15:52 Directed Weighted Graph
19:50 Directed Unweighted Graph
20:32 Summary of Four Graph Types
21:19 Closing and Future Videos

graphs, graph types, data structures, computer science, undirected graph, directed graph, weighted graph, unweighted graph, graph theory, vertices, edges, nodes, algorithms, coding tutorial, programming, binary search tree, network topology, pathfinding

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