Re: Double Parenthesis

[Kieren MacMillan]

Hi Freeman,

> I understand the above and below but not this  let ((rand (random 100)))  
> Put in your form:   (let ((rand (random 100))) ...) 

Here are the thoughts of a Scheme newbie — hopefully they are correct!  =)

Working from the inside out:

The first set of parentheses is needed to encapsulate the random number 
procedure/expression:

  (random 100)

The second set of parentheses associates that procedure/expression (a.k.a. 
result) with a variable [to be set using Let]:

  (rand (random 100))

The third set encloses the "complete set of [Let] variables":

  ((rand (random 100)))

The fourth set [in Harm’s form] is for the Let procedure/expression itself:

  (let ((rand (random 100))))

Hope that helps you understand it!
Kieren.
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Kieren MacMillan, composer (he/him/his)
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