List files recursively in Kotlin

to list files in a directory with kotlin, i used list() and listFiles() functions:

File("/tmp").list().forEach { println(it) }
File("/tmp").listFiles().forEach { println(it) }

but, how can i list files recursively?

Use one of .walk(...), .walkBottomUp() or .walkTopDown() extensions for File, which differ only in the order in which the files appear and all produce a FileTreeWalk, that implements Sequence<File>:

File("/tmp").walkTopDown().forEach { println(it) }