kotlin-stdlib / kotlin.text / append append Common JVM JS Native 1.0 fun < T : Appendable > T . append ( vararg value : CharSequence ? ) : T (source) Appends all arguments to the given Appendable . Common JVM JS Native 1.0 fun StringBuilder . append ( obj : Any ? ) : StringBuilder (source) Deprecated: Use append(value: Any?) instead fun StringBuilder . append ( str : CharArray , offset : Int , len : Int ) : StringBuilder (source) Deprecated: Use appendRange instead. Common JVM JS Native 1.0 fun StringBuilder . append ( vararg value : String ? ) : StringBuilder (source) fun StringBuilder . append ( vararg value : Any ? ) : StringBuilder (source) Appends all arguments to the given StringBuilder.