A+ provides direct ways to specify constant arrays. A list of numbers separated
by blank spaces is one description of a simple constant numeric array. For example, the
constant
10 2.3e-2 34.156

is a floating-point array with
one axis, of length three. The element at index 0 is 10, at index 1 is .023, and at 2 is
34.156. The expression with e means take the number on the left
and multiply it by ten to the power shown on the right. If you omit the blanks between
numbers - a poor idea indeed, since it would make your code very difficult to read - , A+
will give you a numeric vector, but probably not the one you intended. If a number is
being parsed and a character is examined that can't be part of the number, then a new
number is started if the character could begin a number. For instance,

1e-3.5 40.358.62.7 is read by A+ as
0.001 0.5 40.358 0.62 0.7

Simple symbol vectors can be written similarly, and blanks are not needed. One of length five is

`sym1 `sym2 `sym3`sym4`sym5

It is also easy to describe simple constant character vectors. For
example,

'axrTVw'

is a character array with one axis, of length
six. The elements at indices 0, 1, 2, 3, 4, and 5 are, respectively,
'a', 'x', 'r',
'T', 'V', and 'w'. The empty
character vector can be written most easily as '' - just two
quotation marks, with nothing between them.

is an array with one axis. Note that this array has 17 elements, and the index of the
i-th element is i for every i from 0 to 16.
The Interval primitive can also create arrays with more than one axis. For example:

É2 3 5 ã Enter this in an A+ session, and press **Enter**.
0 1 2 3 4 ã These seven rows (one blank) show the result,
5 6 7 8 9 ã which is equal to 2 3 5 Ò É2«3«5
10 11 12 13 14 ã (which could be written 2 3 5ÒÉ2«3«5).
ã A blank line separates planes. If there were a fourth axis,
15 16 17 18 19 ã two blank lines would separate subarrays corresponding to
20 21 22 23 24 ã indices along the first axis, with single blank lines between
25 26 27 28 29 ã subarrays corresponding to indices along the second axis.