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The document specifies both .iota and iota. as
In general, these procedures return the list whose elements are of the form
FROM + i * STEP
where
0 <= i < ceiling((TO-FROM)/STEP) (.IOTA)
0 < i <= floor((TO-FROM)/STEP) (IOTA.)
While these may be a generalization of APL's iota,
what's the rationale for them, vs something like:
(iota count) ; start=0, step=1
(iota count start) ; step=1
(iota count start step)
?