Re: [ROOT] pi

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Use TMath::Pi();

In this class, there are also plenty of standard Physics constants.
See TMath.h for more details.

Rene Brun

Dong Zhou wrote:
> 
> dear rooters:
> 
> i would like to know whether there is a predefined pi(3.1415926....) in root,
> and what is its name.
> 
> thank u
> 
> zhou, dong
> 
> 
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