FYI this is different from NARS2000 and Dyalog, which leave ⎕-variables set to their current value, rather than setting them to some default value.
Jay. On 21 August 2015 at 11:04, Juergen Sauermann <juergen.sauerm...@t-online.de> wrote: > this is a GNU APL feature. Instead of leaving ⎕-variables undefined > and raising the according error when referenced, GNU APL sets them > to their default values when they are being localized.