Re: st: how to express Pi in stata

[Richard Williams <Richard.A.Williams.5@ND.edu>]

At 09:45 AM 12/10/2006, Philipp Rehm wrote:
> di c(pi)
Also

di _pi

It may also be helpful to check out

help _variables

From the first part of the help:

Expressions may also contain _variables (pronounced "underscore 
variables").  These are built in system variables that are created 
and updated by Stata.  They are called _variables because their names 
all begin with the underscore '_' character.


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