[racket] Three questions related DrRacket

Thank you both for your reply.

My real need is to use the result of the first function in the second
function.  Is there a standard way to pass a variable into the next
function?

On Wed, Jun 1, 2011 at 6:24 PM, Shriram Krishnamurthi <sk at cs.brown.edu>wrote:

> Also note that if you programmed in the Student Language levels, this
> function would be illegal (and it might give you some insight into how
> this programming style works).
>
> On Wed, Jun 1, 2011 at 9:19 PM, Justin Zamora <justin at zamora.com> wrote:
> > On Wed, Jun 1, 2011 at 7:22 PM, Yingjian Ma <yingjian.ma1955 at gmail.com>
> wrote:
> >>
> >> In my question
> >> (define (p x)
> >>   (+ x 10)
> >>   (* x 10)
> >>   )
> >> It seems it only executes (* x 10)
> >
> > No, it executes both of them.  It evaluates (+ x 10), then throws away
> > the value it just computed.  Then it evaluated (* x 10), since that is
> > the last expression, the value gets returned as the value of the
> > function.  When there is more than one expression in a function body,
> > all of them get evaluated, but only the last is returned.  If you want
> > to use the results of both expressions, then you need to use two
> > functions, one for each expression, as Shriram said.
> >
> > Justin
> >
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