undefined

The "undefined" type is used as the result type of inspectors that never return a value.

Version Platforms
8.0.584.0 AIX, HP-UX, Mac, Red Hat, SUSE, Session, Solaris, Windows
8.1.535.0 Debian, Ubuntu

Creation

error <string> : undefined
nil : undefined
null : undefined

Casts

<undefined> as string : string