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Scala program to print the left diagonal of MATRIX

Here, we are going to learn how to print the left diagonal of MATRIX in Scala programming language?
Submitted by Nidhi, on May 19, 2021 [Last updated : March 10, 2023]

Scala – Printing the Left Diagonal of Matrix

Here, we will create a 2X2 matrix using a two-dimensional array and then we will read elements of the matrix and then print the left diagonal of the matrix on the console screen.

Scala code to print the left diagonal of matrix

The source code to print the left diagonal of MATRIX is given below. The given program is compiled and executed on the ubuntu 18.04 operating system successfully.

// Scala program to print the 
// left diagonal of MATRIX

object Sample {
  def main(args: Array[String]) {
    var TwoDArr = Array.ofDim[Int](2, 2)
    var i: Int = 0
    var j: Int = 0

    printf("Enter elements of MATRIX:\n")
    i = 0;
    while (i < 2) {
      j = 0;
      while (j < 2) {
        printf("ELEMENT(%d)(%d): ", i, j);
        TwoDArr(i)(j) = scala.io.StdIn.readInt();
        j = j + 1;
      }
      i = i + 1;
    }

    printf("MATRIX:\n")
    i = 0;
    while (i < 2) {
      j = 0;
      while (j < 2) {
        printf("%d ", TwoDArr(i)(j));
        j = j + 1;
      }
      i = i + 1;
      println();
    }

    printf("Left diagonal of matrix:\n")
    i = 0;
    while (i < 2) {
      j = 0;
      while (j < 2) {
        if (i == j)
          printf("%d ", TwoDArr(i)(j));
        else
          printf(" ");
        j = j + 1;
      }
      i = i + 1;
      println();
    }
  }
}

Output

Enter elements of MATRIX:
ELEMENT(0)(0): 10
ELEMENT(0)(1): 20
ELEMENT(1)(0): 30
ELEMENT(1)(1): 40
MATRIX:
10 20 
30 40 
Left diagonal of matrix:
10  
 40

Explanation

In the above program, we used an object-oriented approach to create the program. We created an object Sample, and we defined main() function. The main() function is the entry point for the program.

In the main() function, we created a 2X2 matrix using a two-dimensional array, and then we read the elements of the matrix from the user. Then print the elements of the matrix and also print the left diagonal of the matrix on the console screen.

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