[erlang-questions] Erlang case statement questions

Tony Rogvall <>
Mon Jun 1 21:05:19 CEST 2009


Also.  9 rem 9 = 0!
So I guess your cases should be from 0 to 8 or something similar.

/Tony

On 1 jun 2009, at 19.51, Nahuel Greco wrote:

> End the last clause without the semicolon.
>
> Saludos,
> Nahuel Greco.
>
>
>
> On Mon, Jun 1, 2009 at 2:48 PM, Greg Perry <>  
> wrote:
>> Ok I've put together a simple module declaration but I am getting an
>> error on this case statement.  What am I doing wrong with this?  N  
>> is an
>> integer that gets passed to the module, based upon the return of N  
>> rem
>> 9, PQ then gets assigned the list of items on the right:
>>
>> ----------
>>
>> analyze(N) ->
>>   case (N rem 9) of
>>      1 -> PQ = [{1,1}, {2,5}, {4,7}, {8,8}];
>>      2 -> PQ = [{1,2}, {4,5}, {7,8}];
>>      3 -> PQ = [{1,3}, {2,6}, {3,4}, {3,7}, {5,6}, {6,8}];
>>      4 -> PQ = [{1,4}, {2,2}, {5,8}, {7,7}];
>>      5 -> PQ = [{1,5}, {2,7}, {4,8}];
>>      6 -> PQ = [{1,6}, {2,3}, {3,5}, {3,8}, {4,6}, {6,7}];
>>      7 -> PQ = [{1,7}, {2,8}, {4,4}, {5,5}];
>>      8 -> PQ = [{1,8}, {2,4}, {5,7}];
>>      9 -> PQ = [{1,9}, {2,9}, {3,3}, {3,6}, {3,9}, {4,9}, {5,9},  
>> {6,6},
>> {6,9}, {7,9}, {8,9}, {9,9}];
>>   end.
>>
>> ----------
>>
>> I used the example in Joe's Programming Erlang book for the case
>> statement, but got something wrong obviously.
>>
>> Thanks in advance,
>>
>> Greg
>>
>>
>>
>>
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>
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