Kotlin Program to Multiply two Matrices by Passing Matrix to a Function

Kotlin Program to Multiply two Matrices by Passing Matrix to a Function: In this program, you’ll learn to multiply two matrices using a function in Kotlin. For matrix multiplication to take place, the number of columns of the first matrix must be equal to the number of rows of the second matrix.

Kotlin Program to Multiply two Matrices by Passing Matrix to a Function

Source Code

fun main(args: Array<String>) {
    val r1 = 2
    val c1 = 3
    val r2 = 3
    val c2 = 2
    val firstMatrix = arrayOf(intArrayOf(3, -2, 5), intArrayOf(3, 0, 4))
    val secondMatrix = arrayOf(intArrayOf(2, 3), intArrayOf(-9, 0), intArrayOf(0, 4))

    // Mutliplying Two matrices
    val product = multiplyMatrices(firstMatrix, secondMatrix, r1, c1, c2)

    // Displaying the result
    displayProduct(product)
}

fun multiplyMatrices(firstMatrix: Array, secondMatrix: Array, r1: Int, c1: Int, c2: Int): Array {
    val product = Array(r1) { IntArray(c2) }
    for (i in 0..r1 - 1) {
        for (j in 0..c2 - 1) {
            for (k in 0..c1 - 1) {
                product[i][j] += firstMatrix[i][k] * secondMatrix[k][j]
            }
        }
    }

    return product
}

fun displayProduct(product: Array) {
    println("Product of two matrices is: ")
    for (row in product) {
        for (column in row) {
            print("$column    ")
        }
        println()
    }
}

Output

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