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MathGroup Archive 2007

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Re: using N function

  • To: mathgroup at smc.vnet.net
  • Subject: [mg76395] Re: using N function
  • From: Szabolcs <szhorvat at gmail.com>
  • Date: Mon, 21 May 2007 06:02:23 -0400 (EDT)
  • Organization: University of Bergen
  • References: <f2me6h$lu4$1@smc.vnet.net> <f2orbi$6vd$1@smc.vnet.net>

The OP probably uses Thunderbird, and he copied and pasted the 
expressions from his first message. Thunderbird has the stupid habit to 
display the 2 in x^2 as a superscript. When you copy it, it will be 
copied as x2, not x^2 (and unfortunately nobody cares to fix this bug).

So 640320^3 got turned into 6403203.

Pay attention to this if you use Thunderbird and you are copying 
Mathematica code from e-mail messages ... it bit me more than once.

Szabolcs

Jens-Peer Kuska wrote:
> Hi,
> 
> Mathematica 5.2 and 6.0 say
> 
> 2.625374126343655*10^17
> 
> and so I don't know what you mean ..
> 
> Regards
>    Jens
> 
> kkwweett wrote:
>> Good morning Mathematica users,
>>
>>
>> Can anyone tell me, please, which of a),b) or c) is wrong :
>>
>> a)
>> <MathematicaHelp>
>> <quote>
>>
>> N[expr] is equivalent to N[expr, MachinePrecision].
>>
>> </quote>
>> </MathematicaHelp>
>>
>> b)
>> In[1]:=N[Exp[Sqrt[163 ]Pi] - 6403203]
>> Out[1]=256.
>>
>>
>> c)
>> In[2]:=N[Exp[Sqrt[163 ]Pi] - 6403203,$MachinePrecision]
>> Out[2]=743.9999999999993
>>
>> ?
>>
>> Thank you
>>
> 


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