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Graph Representations

Graphs can be represented in multiple ways depending on the use case. The two most common methods are:

  • Adjacency Matrix
  • Adjacency List

Let’s break down both approaches with examples for undirected and directed graphs.

1 Adjacency Matrix

An adjacency matrix is a 2D array (or matrix) used to represent the presence or absence of edges between vertices.

  • The matrix is of size N × N, where N is the number of vertices.
  • Each cell (i, j) indicates whether there’s an edge from vertex i to vertex j.

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