Math::Tau - provide the important mathematical constant tau = 6.2831...
use Math::Tau; print tau/2; # 3.14159265358979 use utf8; print τ/2; # 3.14159265358979
tau is one of the most fundamental and misunderstood mathematical constants.
See The Tau Manifesto for why pi is a historical mistake.
The mathematical constant 6.2831... as floating point.
The Greek letter, for those of you who like to use Unicode identifiers.
Franklin Chen <firstname.lastname@example.org>
This software is copyright (c) 2013 by Franklin Chen <email@example.com>.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.