toByteArray

Returns an array of Byte containing all of the elements of this generic array.

fun Array<out Byte>.toByteArray(): ByteArray(source)

fun main() {
    // Create an Array<Byte> containing the numbers 10, 20, 30, 40
    val byteArrayList: Array<Byte> = arrayOf(10, 20, 30, 40)

    // Convert the Array<Byte> to a ByteArray using toByteArray()
    val byteArray: ByteArray = byteArrayList.toByteArray()

    // Print the resulting ByteArray
    println(byteArray.joinToString(prefix = "[", postfix = "]"))  // Output: [10, 20, 30, 40]
}

Source