Re: multiple choice IF condition
- To: mathgroup at smc.vnet.net
- Subject: [mg56449] Re: multiple choice IF condition
- From: dh <dh at metrohm.ch>
- Date: Tue, 26 Apr 2005 01:32:49 -0400 (EDT)
- References: <d4hvhj$1ha$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hi Mark,
you may test if the variable i is in a given list like:
MemberQ[{3,5,9,18},i]
Further, "Do" is more appropriate than "Table" for your purpose, because
you do not want to create a table but only the side effect.
with this:
Do[If[MemberQ[{3,5,9,18},i], a = a + i], {i, 20}]
Sincerely, Daniel
marloo3 at mail15.com wrote:
> could we have a more practical way than this way of choosing some numbers of the
> choice:
>
> a = 0;
> Table[If[i == 3 || i == 5 || i == 9 || i==18, a = a + i], {i, 20}]
>
> ie: i wish if it is possible like this:
> If[i==3 ||5 ||9||18, ...]
>
> Thanks very much
> mark
>