firstOrNull
Returns the first character, or null if the char sequence is empty.
fun CharSequence.firstOrNull(): Char?(source)
fun main() {
val text = "Hello, world!"
val firstChar = text.firstOrNull()
println(firstChar) // Prints: H
val emptyText = ""
val noChar = emptyText.firstOrNull()
println(noChar) // Prints: null
}