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Re: Basic conditional statement question.
Either of these will work for you, I think: If[a == 0, Null, Print["such and such"], Print["such and such"]] "such and such" If[ !TrueQ[a == 0], Print["such and such"]] "such and such" Bobby On Wed, 9 Jun 2004 04:17:30 -0400 (EDT), Scott <jujio77 at yahoo.com> wrote: > Here is a question I would think has a simple solution. Let's say I > have some variable "a" which is an integer, but I haven't defined it > in Mathematica. I want to run a conditional statement on it. > Basically > > If[a!=0,Print["such and such"]] > > When I do something like this, Mathematica I asume is spitting out a > null statement, because it doesn't do anything. So, how can I define > "a" such that Mathematica knows it isn't =0 yet, still some integer. > > The reason I ask is I am calculating Christophel symbols (and such) > and many of them =0, so I want to only output those that are not equal > to zero. > > Thanks for any help, > Scott > > -- DrBob at bigfoot.com www.eclecticdreams.net/index.html