[racket] Three questions related DrRacket

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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