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.IX Title "Constants 3pm"
.TH Constants 3pm 2024-04-25 "perl v5.38.2" "User Contributed Perl Documentation"
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.SH NAME
PDL::Constants \-\- basic compile time constants for PDL
.SH DESCRIPTION
.IX Header "DESCRIPTION"
This module is used to define compile time constant
values for PDL.  It uses Perl's constant pragma for
simplicity and availability.
.SH SYNOPSIS
.IX Header "SYNOPSIS"
.Vb 3
\& use PDL::Constants qw(PI E);
\& print \*(AqPI is \*(Aq . PI . "\en";
\& print \*(AqE  is \*(Aq .  E . "\en";
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.SS PI
.IX Subsection "PI"
The ratio of a circle's circumference to its diameter
.SS DEGRAD
.IX Subsection "DEGRAD"
The number of degrees of arc per radian (180/PI)
.SS E
.IX Subsection "E"
The base of the natural logarithms or Euler's number
.SH "COPYRIGHT & LICENSE"
.IX Header "COPYRIGHT & LICENSE"
Copyright 2010 Chris Marshall (chm at cpan dot org).
.PP
This program is free software; you can redistribute it and/or modify it
under the terms of either: the GNU General Public License as published
by the Free Software Foundation; or the Artistic License.
.PP
See http://dev.perl.org/licenses/ for more information.