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Re: When Is Precision[ ] $MachinePrecision, And When Is It Not?

• To: mathgroup at smc.vnet.net
• Subject: [mg47525] Re: When Is Precision[ ] $MachinePrecision, And When Is It Not?
• From: Harold.Noffke at wpafb.af.mil (Harold Noffke)
• Date: Thu, 15 Apr 2004 03:39:39 -0400 (EDT)
• References: <c5dhrd$nqp$1@smc.vnet.net> <c5gg7l$att$1@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

Bobby:

Thanks for your examples.  I thought about them, and found a very
short one which still bothers me, because the answer is not what I
expected ...

In[1]:= N[2/3]

Out[1]= 0.666667

In[2]:= N[2/3]==2/3

Out[2]= True

In[3]:= ?==
lhs == rhs returns True if lhs and rhs are identical.

Regards,
Harold

• Follow-Ups:
  • Re: Re: When Is Precision[ ] $MachinePrecision, And When Is It Not?
    • From: Murray Eisenberg <murray@math.umass.edu>