```fun parseInt(str: String): Int? = try { str...

# announcements

[douglarek]

fun parseInt(str: String): Int? = try {
    str.toInt()
} catch (e: NumberFormatException) {
    null
}

fun main(args: Array<String>) {
    val x = parseInt("1")
    val y = parseInt("2")

    println(x * y)
}