Re: List Position

*To*: mathgroup at smc.vnet.net*Subject*: [mg15815] Re: List Position*From*: JOERG SCHLICHTMANN <joerg.schlichtmann at ruhr-uni-bochum.de>*Date*: Fri, 12 Feb 1999 18:39:38 -0500 (EST)*Organization*: Ruhr-Universitaet Bochum, Rechenzentrum*References*: <79eagc$9ig@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Harry flynn schrieb: > > Can anyone tell me how I find the position in a list of the first value > less than or equal to zero. > For example, how can I get Mathematica to tell me that in the list > {{1},{1},{2},{8},{-3}} > that the first value of interest to me is position 5. Thanks in advance. > Harry. What about this: e.g. the list l: l={{1},{1},{2},{8},{-3},{4},{-1},{0}}; finding the element {-3} functions as follows: i=1;While[i<Length[l], If[l[[i,1]]<=0,{Print[l[[i]]," at Position ", i],i=Length[l]+1},i++]] wr Joerg