Kotlin – Matrix Addition

Kotlin – Matrix Addition

In Kotlin, matrix addition involves adding corresponding elements of two matrices to create a new matrix with the same dimensions.

Example

The following is a simple example of adding two matrices element-wise.

Kotlin Program

fun main() {
    // Define the matrices
    val matrix1 = arrayOf(
        intArrayOf(1, 2, 3),
        intArrayOf(4, 5, 6)
    )
    val matrix2 = arrayOf(
        intArrayOf(7, 8, 9),
        intArrayOf(10, 11, 12)
    )

    // Perform matrix addition
    val resultMatrix = Array(matrix1.size) { i ->
        IntArray(matrix1[0].size) { j ->
            matrix1[i][j] + matrix2[i][j]
        }
    }

    // Print the result matrix
    for (row in resultMatrix) {
        for (element in row) {
            print("$element ")
        }
        println()
    }
}

Output

8 10 12 
14 16 18 

In the program,

1. Define Matrices: Two matrices matrix1 and matrix2 are defined using nested arrays. These matrices are 2×3 matrices (2 rows and 3 columns).
2. Perform Matrix Addition:
   • A new matrix resultMatrix is created using the Array constructor with the same dimensions as matrix1.
   • The elements of resultMatrix are calculated by adding the corresponding elements of matrix1 and matrix2.
3. Print Result:
   • The result matrix is printed using nested loops. Each element of the result matrix is printed, and a newline is added after each row.

We have used nested for loop to iterate over the elements in all the rows of the two matrices.

References

• Matrix Addition by mathpi.net

Summary

Matrix addition in Kotlin is done by adding corresponding elements of two matrices to generate a new matrix with the same dimensions. It follows the basic mathematical principle of element-wise addition.