First forward into Logo 8: more about variables

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Previous: FF7

You might like to learn some more Logo by going to Muggles, Logo and Gradients.

Consider the following procedure:

TO PATTERN :SIZE

REPEAT 5 [FORWARD :SIZE RT 144]

END

What is different about this procedure?   Did you notice :SIZE ?   It is called a VARIABLE .   It is always written in a particular way using a colon.   What do you think this is about?   What does the word variable suggest to you?   Why not type in the procedure above and then copy the following: PATTERN 30 PATTERN 60 PATTERN 120

Image

Or experiment with different numbers for yourself and see what patterns you can produce.

Are you feeling happier with the idea of a variable? If so why not explore further this idea of using a variable in those procedures you have met previously.

TO SQUARE :SIZE

REPEAT 4 [ FD :SIZE RT 90]

END

TO HEXAGON :S

REPEAT 6 [ FD :S RT 60]

END

TO DODECA :S

REPEAT 12 [BK :S LT 30]

END

 

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