Re: Puzzled by IntegerPart
- To: mathgroup at smc.vnet.net
- Subject: [mg114618] Re: Puzzled by IntegerPart
- From: Bill Rowe <readnews at sbcglobal.net>
- Date: Fri, 10 Dec 2010 02:31:24 -0500 (EST)
On 12/9/10 at 6:00 AM, tmatsoukas at me.com (Themis Matsoukas) wrote:
>IntegerPart[100*1.15]
>114
In[2]:= RealDigits[100*1.15]
Out[2]= {{1,1,4,9,9,9,9,9,9,9,9,9,9,9,9,9},3}
This is the nature of machine precision arithemtic. Perhaps you
should use
In[3]:= Rationalize[100*1.15]
Out[3]= 115
or
In[4]:= Round[100*1.15]
Out[4]= 115