kotlin-stdlib / kotlin.text / first first Common JVM JS Native 1.0 fun CharSequence . first ( ) : Char (source) Returns the first character. Exceptions NoSuchElementException - if the char sequence is empty. Common JVM JS Native 1.0 inline fun CharSequence . first ( predicate : ( Char ) -> Boolean ) : Char (source) Returns the first character matching the given predicate . Exceptions NoSuchElementException - if no such character is found.