Mathematica 9 is now available
Services & Resources / Wolfram Forums / MathGroup Archive
-----

MathGroup Archive 2010

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: local variables - Module, For loop

  • To: mathgroup at smc.vnet.net
  • Subject: [mg113064] Re: local variables - Module, For loop
  • From: Sebastian Schmitt <sschmitt at physi.uni-heidelberg.de>
  • Date: Tue, 12 Oct 2010 04:28:35 -0400 (EDT)

Hi Patrick!

Thanks for the suggestion. Does this scale to nested or very "long" For
loops? The Table will return a List in any case:

In[7]:= Table[, {i, 0, 10}]

Out[7]= {Null, Null, Null, Null, Null, Null, Null, Null, Null, Null, \
Null}

Cheers,

Sebastian

Patrick Scheibe wrote:
> Hi,
> 
> then use Table, which is "more natural" and doesn't set the iterations variable.
> 
> x = 10;
> Table[Print[i], {i, 0, x}];
> 
> Cheers
> Patrick
> 
> On Oct 11, 2010, at 11:15 AM, Sebastian Schmitt wrote:
> 
>> Dear all!
>> 
>> (I recycle my disclaimer.)
>> 
>> I'm new to Mathematica with a background mostly in C++. Many times I
>> have the impression that my style is not natural-Mathematica
>> (Mathematicaesque so to say).
>> 
>> If I have a For loop in a function like this:
>> 
>> In[39]:= f[x_] := Module[{},
>>  For[i = 0, i != x, i++,
>>   Print[i]
>>   ]
>>  ]
>> 
>> In[41]:= f[2]
>> 
>> During evaluation of In[41]:= 0
>> 
>> During evaluation of In[41]:= 1
>> 
>> In[42]:= i
>> 
>> Out[42]= 2
>> 
>> I was surprised to find "i" being not local to the For loop. Do I have
>> to keep track of all my throw-away-variables and put them in the list of
>> local variables of the Module? I find it pretty tedious. Is there a
>> better way?
>> 
>> Thanks in advance,
>> 
>> Sebastian
>> 
> 
> 



  • Prev by Date: Re: local variables - Module, For loop
  • Next by Date: Re: Nested list - adding to each entry
  • Previous by thread: Re: local variables - Module, For loop
  • Next by thread: Re: local variables - Module, For loop