LOGO-L> Re: IF syntax

[George Mills <mills@softronix.com>]

Andrew B. Ritter wrote:
> 
> I am having a bit of a problem with IF syntax.  I have attached a .lgo
> file in which I am trying to capture user input using READCHAR, and
> then  set the color of the pen to red, green, or blue.  Can you point
> out my error(s).  Thanks.
> 
> Andrew Ritter
> aritter@datapex.com
> 
>     ---------------------------------------------------------------
> to pen.color
> 
> print [Which pen color do you want to use (r, g, or b)?]
> make "ans readchar
> if "ans = "r [setpencolor [255 0 0]]
> if "ans = "g [setpencolor [0 255 0]]
> if "ans = "b [setpencolor [ 0 0 255]]
> st
> end

to pen.color
print [Which pen color do you want to use (r, g, or b)?]
make "ans readchar
if :ans = "r [setpencolor [255 0 0]]
if :ans = "g [setpencolor [0 255 0]]
if :ans = "b [setpencolor [0 0 255]]
st
end

Or even better

to pen.color
make "ans selectbox [Choose Color] [Red Green Blue]
if :ans = 1 [setpencolor [255 0 0]]
if :ans = 2 [setpencolor [0 255 0]]
if :ans = 3 [setpencolor [0 0 255]]
st
end

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-- 
===============================================================
George Mills (mills@softronix.com)
http://www.softronix.com/
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