# What Is Graph in Data Structure PPT?

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Angela Bailey

Graph is a fundamental data structure used in computer science and mathematics to represent relationships between objects. It is a collection of nodes or vertices connected by edges. In this tutorial, we will discuss the concept of graphs in detail and explore their applications.

## What Is a Graph?

A graph is a non-linear data structure consisting of two components: vertices (also called nodes) and edges. Vertices represent objects, while edges represent the connections or relationships between those objects.

### Types of Graphs

There are several types of graphs, including:

• Undirected Graph: In an undirected graph, the edges have no direction. The connection between two vertices is bidirectional, meaning that if vertex A is connected to vertex B, then vertex B is also connected to vertex A.
• Directed Graph: In a directed graph, each edge has a specific direction.

The connection between two vertices is unidirectional, meaning that if vertex A is connected to vertex B, it does not necessarily mean that vertex B is connected to vertex A.

• Weighted Graph: In a weighted graph, each edge has an associated weight or cost. This weight represents some value or property associated with the connection between the vertices.
• Cyclic Graph: A cyclic graph contains at least one cycle—a path that starts and ends at the same node.
• Acyclic Graph: An acyclic graph does not contain any cycles.

### Applications of Graphs

The concept of graphs finds numerous applications in various domains:

• Social Networks: Graphs are used to represent social networks, where individuals are represented as nodes, and relationships between individuals are represented as edges.
• Transportation Networks: Graphs represent transportation networks, such as road networks or flight connections, where nodes represent locations and edges represent the connections between them.
• Web Pages: In web development, graphs are used to represent the structure of web pages. Each page is a node, and hyperlinks are the edges connecting these nodes.
• Data Analysis: Graphs are used for data analysis and visualization. They help in understanding complex relationships and patterns in large datasets.

## Conclusion

In this tutorial, we explored the concept of graphs—a fundamental data structure used to represent relationships between objects. We discussed various types of graphs and their applications in different domains. Understanding graphs is crucial for solving many real-world problems efficiently.

Now that you have a basic understanding of graphs, you can dive deeper into this topic and explore advanced algorithms and techniques related to graph traversal and manipulation.