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Re: Help needed with List!

  • To: mathgroup at
  • Subject: [mg16948] Re: Help needed with List!
  • From: "Stephen P Luttrell" <luttrell at>
  • Date: Thu, 8 Apr 1999 02:32:45 -0400
  • Organization: Defence Evaluation and Research Agency
  • References: <7ec5kg$>
  • Sender: owner-wri-mathgroup at

>Sirs Probably these are FAQs but I am new in this newsgroup and I have not
>been able to solve them. I use Mathematica 3.0:  (i) I need to convert a
>integer number in List format. For example if I had the number 123456 I
>to convert it into {1,2,3,4,5,6}:  Is it possible with an instruction? And,
>(ii) I need to delete from a List A the common elements with other List B:
>for example if A = {1,2,3,4} and B = {1,2} I need to delete by an
>the elements 1, 2 of List B from List A to obtain List C = {3,4}.  I am
>working with integers with 10.000 digits or more so you can appreciate how
>helpful for me it would be to solve these questions.  Thanks in advance.

Here is a solution:

In[1]:=IntegerDigits[123456 ]


A = {1,2,3,4} ;
B = {1,2} ;


Stephen P Luttrell
Signal Processing and Imagery Department
DERA Malvern, St.Andrew's Road
Malvern, United Kingdom, WR14 3PS

+44 (0)1684 894046 (tel)
+44 (0)1684 894384 (fax)
luttrell at (email)

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