[racket] Type of argument in a function

thank u all!! :)


2014-07-20 16:09 GMT+03:00 קוראל אלימלך <coral2301 at gmail.com>:

> תודה רבה לכולם :)
> עזרתם לי מאוד!
>
>
> 2014-07-20 15:59 GMT+03:00 David Van Horn <dvanhorn at cs.umd.edu>:
>
>> On 7/20/14, 7:04 AM, קוראל אלימלך wrote:
>> > How can i define that a function will get an integer argument?
>> >
>> > is its possible?
>> >
>> > for example:
>> > (define (func (x::Number))) /// its not working that way
>> >
>> > and if ill call the function with string there will be an error..
>>
>> In addition to the suggestions to use Typed Racket, you may also want to
>> read about contracts:
>>
>> (define/contract (f x) (-> integer? integer?)
>>   (* x x))
>>
>> http://docs.racket-lang.org/guide/contracts.html
>>
>> David
>>
>>
>>
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>
>
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