Program to print a matrix in Diagonal Pattern.

Following is the Java program to print diagonal pattern of a given matrix.

Example

 Live Demo

public class DiagonalMatrix {
   public static void main(String args[]){
      int a[][]={{1,2,3},{4,5,6},{7,8,9}};
      int rows = a.length;
      int columns = a[0].length;
      for (int i = 0; i < rows; i++) {
         for (int r = i, c = 0; r >= 0 && c < columns; r--, c++){
            System.out.print(a[r][c] + " ");
         }
         System.out.println();
      }
      for (int i = 1; i < columns; i++) {
         for (int r = rows-1, c = i; r >= 0 && c < columns; r--, c++) {
            System.out.print(a[r][c] + " ");
         }
         System.out.println();
      }
   }
}

Output

1
4 2
7 5 3
8 6
9