[MWForum]curious code

[Jeff Knope]

Hi Jim,

I'm not trying to be picky, but rather pointing out something basic here:

To say, "the inputs are 150 and 2" denies the purpose of inputs to 
procedures.  If you always want :x to be 150 and :n to be 2, then skip using 
inputs, and just put those values in the procedure.

The purpose of the inputs is to provide variable values for the procedure to 
use, resulting in different bahavior depending on the inputs.

Here is a simple example:

    to SQ :sz
    repeat 4 [fd :sz rt 90]
    end

Each time you call SQ with a different value for :sz, it will draw a square 
of a different size.

You can also change the value of :sz from within another procedure, "on the 
fly"... for example:

    to FAN :sz
    setc 15
    repeat 72 [SQ :sz rt 5 setc color + 10 make "sz :sz + 4]
    end

Now, each call to SQ (from within FAN) will use a new value for :sz - and 
also, each square will be drawn with a new color.

Jeff

----- Original Message ----- 
From: <jbonnes@libertyschool.us>
To: <mwforum@lists.mathcats.com>
Sent: Wednesday, March 16, 2005 12:32 PM
Subject: [MWForum]curious code


> Thanks Jeff and Daniel,
> This is code that works,
> to el :x :n
> pd
> ifelse :n = 0 [ fd :x ]
> [repeat 4 [ cl :x / 3 (:n - 1) rt 90]]
> end
> the inputs are 150 and 2
> Jim
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