The value union. undefined is void — the value of a statement with no value (a plain command in v1, an empty block). A single Stuff and a StuffList are distinct: ( gus ) may yield one, ( glasses on bar ) a list.
undefined
Stuff
StuffList
( gus )
( glasses on bar )
The value union.
undefinedis void — the value of a statement with no value (a plain command in v1, an empty block). A singleStuffand aStuffListare distinct:( gus )may yield one,( glasses on bar )a list.