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In case it hasn't been mentioned before, I'd recommend a book called 'OCaml from the very beginning'. The exercises there are very useful and I found the explanations/answers to be clear.
http://ocaml-book.com/
Best wishes,
Amir
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> On 15 Oct 2014, at 13:34, Roelof Wobben [email protected] [ocaml_beginners] <[email protected]> wrote:
>
> Thanks .
>
> Now I understand where I did go wrong.
>
> Roelof
>
>
>
> John Whitington [email protected] [ocaml_beginners] schreef op
> 15-10-2014 14:32:
>> Hi,
>>
>> You're using this syntax twice, nested:
>>
>> let <name> = <expression> in <another expression>
>>
>> which binds the <name> (e.g x, to the value of the <expression> e.g 1)
>> in <another expression>.
>>
>> In your example, we can insert some parentheses, without changing the
>> meaning of the expression. Can you see what's happening now?
>>
>> let x = 1 in (let x = 2 in x + x)
>> --> let x = 1 in 4
>> --> 4
>>
>> Thanks,
>>
>> John
>>
>> Roelof Wobben [email protected] [ocaml_beginners] wrote:
>>> oke,
>>>
>>> I thought I had to read it as follows
>>>
>>> let x = 1 the first x in x + x is a 1
>>> let x = 2 so the second x in x + x is a 2 so it will be 1 + 2 = 3
>>>
>>> Roelof
>>>
>>>
>>>
>>> Lukasz Stafiniak [email protected] [ocaml_beginners] schreef op
>>> 15-10-2014 14:21:
>>>> On Wed, Oct 15, 2014 at 2:17 PM, Roelof Wobben [email protected]
>>>> <mailto:[email protected]> [ocaml_beginners]
>>>> <[email protected]
>>>> <mailto:[email protected]>> wrote:
>>>>
>>>> Hello,
>>>>
>>>> I have this programm :
>>>>
>>>> let x = 1 in let x = 2 in x + x
>>>>
>>>> I was expected to see a outcome of 3 but when I run it I see a
>>>> outcome
>>>> of 4 ,
>>>>
>>>> Can someone explain to me why ??
>>>>
>>>> If x is an integer, then x + x = 2 * x is an even number. 3 is not an
>>>> even number so it cannot be equal to x + x for any x. Since x = 2,
>>>> therefore x + x = 2 + 2 = 4.
>>>>
>>>> Regards.
>
>
>
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