Java Program To Check For Lower Triangular Matrix

Chapter: Math Class Last Updated: 28-05-2016 12:56:11 UTC

Program:

            /* ............... START ............... */
                
import java.util.*;

public class JavaLowerTriangularMatrix {

	public static void main(String args[]) throws Exception {
		Scanner scanner = new Scanner(System.in);
		System.out.print("Enter the size of the matrix : ");
		int m = scanner.nextInt();
		int A[][] = new int[m][m];

		/* Inputting the matrix */
		for (int i = 0; i < m; i++) {
			for (int j = 0; j < m; j++) {
				System.out.print("Enter an element : ");
				A[i][j] = scanner.nextInt();
			}
		}

		/* Printing the matrix */
		System.out.println("*************************");
		System.out.println("The Matrix is : ");
		for (int i = 0; i < m; i++) {
			for (int j = 0; j < m; j++) {
				System.out.print(A[i][j] + "\t");
			}
			System.out.println();
		}
		System.out.println("*************************");

		int p = 0;

		for (int i = 0; i < m; i++) {
			for (int j = i + 1; j < m; j++) {
				/* Checking that the matrix is Lower Triangular or not */
				if (A[i][j] != 0) // All elements above the diagonal must be
									// zero
				{
					p = 1;
					break;
				}
			}
		}

		if (p == 0)
			System.out.println("The matrix is Lower Triangular");
		else
			System.out.println("The matrix is not Lower Triangular");
	}
}
                /* ............... END ............... */
        

Output

Enter the size of the matrix : 4
Enter an element : 5
Enter an element : 0
Enter an element : 0
Enter an element : 0
Enter an element : 3
Enter an element : 1
Enter an element : 0
Enter an element : 0
Enter an element : 4
Enter an element : 9
Enter an element : 4
Enter an element : 0
Enter an element : 6
Enter an element : 8
Enter an element : 7
Enter an element : 2
*************************
The Matrix is :
5	0	0	0
3	1	0	0
4	9	4	0
6	8	7	2
*************************
The matrix is Lower Triangular

Tags

Java Program To Check For Lower Triangular Matrix, Java, Math

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