SymmetricMatrix.java

// Java Program to check whether matrix is
// symmetric or not

// Importing all classes of
// java.util package
import java.util.*;

// Class
public class GFG {
	// Matrix 1

	// Method to check whether the matrix is
	// symmetric or asymmetric
	static void checkSymmetric(int mat[][], int row,
							int col)
	{
		int i, j, flag = 1;

		// Display message
		System.out.println("The matrix formed is:");

		// Nested for loop for matrix iteration

		// Outer loop for rows
		for (i = 0; i < row; i++) {
			// Inner loop for columns
			for (j = 0; j < col; j++) {
				// Print matrix
				System.out.print(mat[i][j] + "\t");
			}

			System.out.println("");
		}

		// Matrix 2

		// Finding transpose of the matrix
		int[][] transpose = new int[row][col];

		// Again, nested for loop for matrix iteration

		// Outer loop for rows
		for (i = 0; i < row; i++) {

			// Inner loop for columns
			for (j = 0; j < col; j++) {

				// Print matrix elements
				transpose[j][i] = mat[i][j];
			}
		}

		// Condition check over Matrix 1 with Matrix 2

		if (row == col) {

			// Outer loop for rows
			for (i = 0; i < row; i++) {

				// Inner loop for columns
				for (j = 0; j < col; j++) {

					// Comparing two matrices
					if (mat[i][j] != transpose[i][j]) {
						flag = 0;
						break;
					}
				}

				// Setting a flag value for symmetric matrix
				if (flag == 0) {

					// Display message
					System.out.print(
						"\nThe matrix is not symmetric");
					break;
				}
			}

			// Setting a flag value different from above
			// for symmetric matrix
			if (flag == 1) {

				// Display message
				System.out.print(
					"\nThe matrix is symmetric");
			}
		}

		// If it isn't a square matrix
		// then it can't be a symmetric matrix
		else {

			// Display message
			System.out.print(
				"\nThe matrix is not symmetric");
		}
	}

	// Main driver method
	public static void main(String args[])
	{
		// Taking input from the user
		Scanner sc = new Scanner(System.in);

		// Declaring variables and setting flag to 1
		int i, j, row, col, flag = 1;

		// Taking input from the user
		System.out.print("Enter the number of rows:");
		row = sc.nextInt();

		// Display message
		System.out.print("Enter the number of columns:");

		// Reading matrix elements individually using
		// nextInt() method
		col = sc.nextInt();

		// Declaring a 2D array(matrix)
		int[][] mat = new int[row][col];

		// Display message
		System.out.println("Enter the matrix elements:");

		// Nested for loop for traversing matrix

		// Outer loop for rows
		for (i = 0; i < row; i++) {

			// Inner loop for colummns
			for (j = 0; j < col; j++) {

				// Print matrix element
				mat[i][j] = sc.nextInt();
			}
		}

		// calling function made above to check
		// whether matrix is symmetric or not
		checkSymmetric(mat, row, col);
	}
}