Re: MemberQ

*To*: mathgroup at smc.vnet.net*Subject*: [mg68536] Re: MemberQ*From*: Bill Rowe <readnewsciv at earthlink.net>*Date*: Wed, 9 Aug 2006 04:19:04 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

On 8/8/06 at 6:28 AM, vze269bv at verizon.net (Bruce Colletti) wrote: >Re Mathematica 5.2.0.0. >Since 0.7 is in the set {0.0, 0.1, 0.2,..., 0.9, 1.0}, why does >MemberQ[Range[0., 1., .1], .7] return False? It is due to using inexact numbers, i.e. In[22]:= RealDigits[Range[0.,1.,.1][[8]]] Out[22]= {{7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},0} but In[23]:= RealDigits[.7] Out[23]= {{7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},0} In[24]:= $Version Out[24]= 5.2 for Mac OS X (June 20, 2005) -- To reply via email subtract one hundred and four