# Graph - Adjacency Matrix Representation

In this page, we will learn about Adjacency Matrix Representation of graph.

## Graph Representation

There are different ways to represent Graph - Adjacency Matrix Representation & Adjacency List Representation

### Adjacency Matrix Representation

One simple way is to use **adjacency matrix** representation which uses a two-dimensional array. Adjacency matrix is a square matrix with each entry indicating whether a pair of vertices are adjacent to each another.

- If there is an edge between two vertices v
_{i}and v_{j}, then we set**A[v**._{i}][v_{j}]=1 - Otherwise we set the entry in the array to 0.
For the above graph, For adjacency matrix, put

**1**in the table as shown below if V_{i}and V_{j}have edge in the graph else put**0**.Suppose, if the edge is associated with weight, then we can set

**A[v**equal to the weight. The memory space required for this adjacency matrix is O(|V|_{i}][v_{j}]^{2}).

For adjacency matrix, put the weightage in the table if V

_{i}and V_{j}have edge with weightage, else put some constant**C**. Here we take the constant as**∞**.The self ending edge weightage is**0**. If the graph is dense, an**adjacency matrix**is suitable for graph representation.