Re: strange bug?
- To: mathgroup at smc.vnet.net
- Subject: [mg79189] Re: strange bug?
- From: Peter Pein <petsie at dordos.net>
- Date: Fri, 20 Jul 2007 03:35:14 -0400 (EDT)
- References: <f7n4k9$24e$1@smc.vnet.net>
Jeremy Price schrieb: > I think I've found a bug in mathematica 5.2, > > In[418]:= > $Version > > Out[418]= > 5.2 for Microsoft Windows (June 20, 2005) > > When I run, eg, > > In[416]:= IntegerPart[10*5.1] > > Out[416]= 51 > > I get what I expect. But when I run the same thing in a loop, > > For[n = 1, n < 20, n = n + .1, > Print[n, " ", IntegerPart[10*n]] > ] > > I get output like: > >>From In[415]:= 4.2 42 > >>From In[415]:=4.3 43 > >>From In[415]:=4.4 44 > >>From In[415]:=4.5 45 > >>From In[415]:=4.6 46 > >>From In[415]:=4.7 47 > >>From In[415]:=4.8 48 > >>From In[415]:=4.9 48 > >>From In[415]:=5. 49 > >>From In[415]:=5.1 50 > >>From In[415]:=5.2 51 > > Any idea what's going on here or how to fix it? > Hi Jeremy. if there is a possibility to use exact numbers, do so: Print[N[#], " ", IntegerPart[10#]] & /@ (Range[10, 199]/10); Peter