C++ Program to Find if an Array is an Identity Matrix2 min read

In this tutorial, we will learn and write a C++ program to check whether a given matrix is an identity matrix or not. To understand the coding, you should have knowledge of the following topics in C++ programming:


Identity Matrix:

A square matrix is said to be an identity matrix if each entry on its diagonal is equal to 1 and the rest are 0. Example:

Matrix of dimension 3 by 3:
1 0 0
0 1 0
0 0 1


Explanation: The program takes user input for the number of rows and columns of a matrix. The values are of each element are also taken from the user.

Before entering the elements of the matrix, the program also checks for the matrix to be a square matrix. If it is a square matrix then the execution control moves to the next line but if not then the program is exited.

The program checks the diagonals matrix for 1 and the rest for 0. If the conditions are found to be true then the entered matrix is identity matrix else not.

Now let us go through a program for Identity Matrix in C++.


C++ Program to Find if an Array is an Identity Matrix

Output:

identity matrix in C++

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