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.