# 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