randomOrNull
Returns a random character from this char sequence, or null if this char sequence is empty.
inline fun CharSequence.randomOrNull(): Char?(source)
fun main() {
val text = "Kotlin"
val randomChar = text.randomOrNull()
println("Random character from \"$text\": $randomChar")
val emptyText = ""
val emptyRandom = emptyText.randomOrNull()
println("Random character from empty string: $emptyRandom")
}