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# Scala program to calculate the sum of rows of matrix elements

Here, we are going to learn how to calculate the sum of rows of matrix elements in Scala programming language?
Submitted by Nidhi, on May 19, 2021 [Last updated : March 10, 2023]

## Scala – Sum of Rows of Matrix Elements

Here, we will create a 2X2 matrix using a two-dimensional array and then we will read elements of the matrix and calculate the sum of rows of matrix elements.

## Scala code to find the sum of rows of matrix elements

The source code to calculate the sum of rows of matrix elements is given below. The given program is compiled and executed on the ubuntu 18.04 operating system successfully.

```// Scala program to calculate the
// sum of rows of matrix elements

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

var sum: 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();
}

i = 0;
while (i < 2) {
j = 0;
sum = 0;
while (j < 2) {
sum = sum + TwoDArr(i)(j);
j = j + 1;
}
printf("Sum of row(%d): %d\n", i, sum);
i = i + 1;
}
}
}
```

## 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
Sum of row(0): 30
Sum of row(1): 70
```

## 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 we calculated the sum of rows of matrix elements. After that, we printed the elements of the matrix and the sum of rows element on the console screen.

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