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
>

```

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