kotlin-stdlib / kotlin.text / randomOrNull randomOrNull Common JVM JS Native 1.4 fun CharSequence . randomOrNull ( ) : Char ? (source) Returns a random character from this char sequence, or null if this char sequence is empty. Common JVM JS Native 1.4 fun CharSequence . randomOrNull ( random : Random ) : Char ? (source) Returns a random character from this char sequence using the specified source of randomness, or null if this char sequence is empty.