Array of numbers whose name is longer than one letter:

# of
dimensions
+-----------------+-----------------+-------------~ ~-----------------+---------+--------+---------~ ~---------+-------------~ ~-------------+
| 0 1 1 1 1 1 1 1 | 1 0 0 | 0 1 1 ~ ~ 1 | 2 bytes | 1 byte | 2 bytes ~ ~ 2 bytes | 5 bytes each~ ~ |
+-----------------+-----------------+-------------~ ~-----------------+---------+--------+---------~ ~---------+-------------~ ~-------------+
7Fh Letter (≥60h) 2nd Letter Last Letter (≤80h) 1st dimension Last dimension Elements
Specifically for arrays the order of the elements is as follows:
and so on for all possible values of the first subscript.
The elements with a given first subscript are ordered in the same way using the second subscript, and so on down to the last. As an example, the elements of the 3 x 6 array b in Chapter 11 are stored in the order b(1,1) b(1,2) b(1,3) b(1,4) b(1,5) b(1,6) b(2,1) b(2,2) ... b(2,6) b(3,1) b(3,2) ... b(3,6).
Control variable of a FOR...NEXT loop:

Statement
# within
LSB MSB line
+-----------------+---------+---------+---------+-------------+--------+
| 1 1 1 | 5 bytes | 5 bytes | 5 bytes | 2 bytes | 1 byte |
+-----------------+---------+---------+---------+-------------+--------+
Letter (≥60h) Value Limit Step Looping line
Control variable of a FOR...NEXT loop whose name is longer than one letter:

Statement
# within
LSB MSB line
+-----------------+-------------~ ~-----------------+---------+---------+---------+-------------+--------+
| 1 0 1 | 0 1 1 ~ ~ 1 | 5 bytes | 5 bytes | 5 bytes | 2 bytes | 1 byte |
+-----------------+-------------~ ~-----------------+---------+---------+---------+-------------+--------+
Letter (≥60h) 2nd Letter Last Letter (≤80h ≥20h) Value Limit Step Looping line
String:

+-----------------+-------------+--------------~ ~--------------+
| 0 1 0 | 2 bytes | ~ ~ |
+-----------------+-------------+--------------~ ~--------------+
Letter (≥60h) Number of Text of string (may be empty)
characters
String whose name is longer than one letter:

+-----------------+-----------------+-------------~ ~-----------------+---------+--------------~ ~--------------+
| 0 1 1 1 1 1 1 1 | 0 1 0 | 0 1 1 ~ ~ 1 | 2 bytes | ~ ~ |
+-----------------+-----------------+-------------~ ~-----------------+---------+--------------~ ~--------------+
7Fh Letter (≥60h) 2nd Letter Last Letter (≤80h) Text of string (may be empty)
Array of characters:

# of
dimensions
+-----------------+-------------+--------+---------~ ~---------+-------------~ ~-------------+
| 1 1 0 | 2 bytes | 1 byte | 2 bytes ~ ~ 2 bytes | 1 byte each ~ ~ |
+-----------------+-------------+--------+---------~ ~---------+-------------~ ~-------------+
Letter (≥60h) Total length 1st dimension Last dimension Elements
of elements
and dimensions
+ 1 for # of
dimensions
ZX Spectrum Next User Manual, 3rd Edition (ISBN 978-1-5272-5496-1), written and illustrated by Phoebus R. Dokos. Copyright © 2020-2024 Phoebus Dokos / SpecNext Ltd. Licensed under CC BY-NC-SA 4.0. This is a transcription and can contain errors; check any doubt against the printed page.