On default numerical precision
- To: mathgroup at smc.vnet.net
- Subject: [mg90665] On default numerical precision
- From: sergio_r at mail.com
- Date: Fri, 18 Jul 2008 04:02:39 -0400 (EDT)
Hello all, I am wonderin on how to change the mathematica default printing precision, so I don't have to type on any defined constant the required precision, like " `30 " in: In[1]:= a=2.3`30; b=2.1`30; In[2]:= a*b Out[2]= 4.83000000000000000000000000000 I would like to be able to do: a=2.3; b=2.1; and obtain a*b = 4.83000000000000000000000000000 Regards, Sergio PS. Apparently the internal variable $Pre could be set to do that, but the respective help page [ http://reference.wolfram.com/mathematica/ref/$Pre.html ] is not clear about how to do that.