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Tim Hartnell
1985
Book
£2.99
Unknown (Imported From Infoseek)
Not Applicable
Undetermined

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39
John Gilbert
Chris Bourne

IF YOU HAVE not learnt about the joys of Logo then Spectrum Plus Logo, by Tim Hartnell, provides everything you need to get started.

It is not just a book of pretty patterns produced by short listings. Hartnell has produced a version of Logo, close to the LCSI standard which is included in the book. He starts with a brief introduction to turtle graphics and shows how the language can be applied to the real world using a floor turtle to draw mathematical patterns.

The rest of the book deals with how to use Hartnell's Logo-K language, the listing for which is reproduced at the back. Hartnell uses a simple style, in text and listings, but does not miss an opportunity to show that Logo is a fun, as well as being an educational, language.

The example listings may be short - some of them are only three lines in length - but they all produce spectacular results. Starting with a simple recursive flag design Hartnell shows that there is art in the mathematics of angles. By the time you reach the end of the book you will be reproducing patterns to equal spirograph creations and have lost your fear of mathematics.

At £2.99 the book represents excellent value. Although Logo-K is written in Basic and produces turtle graphics slowly it will respond to a large number of commands.

The book is ideal for schools and colleges where it could be used as a general text on Logo and a source for an implementation of the language which students could type into their home machines. Tim Hartnell has come up with an educational winner.

John Gilbert

Publisher: Interface. 9-11 Kensington High Street, London W8 5NP
Price: £2.99

*****

5/5