How to use rad2rad

[Masayoshi Fujimoto]

Could you tell me very easy simple example how to use rad2rad function? Here is my perl programme. I got the following message:

Undefined subroutine &main::rad2rad called at sample.pl line 8.

#!/usr/bin/perl
use Modern::Perl;
use autodie; 
use Math::Trig;
use Math::Trig ':pi';

my $radians;
my $radians_wrapped_by_2pi = rad2rad($radians);

[Athanasius]

Hello Masayoshi Fujimoto, and welcome to the Monastery!

The function rad2rad is not exported by the Math::Trig module, so to use it you need to put the full module name in front:

my $radians_wrapped_by_2pi = Math::Trig::rad2rad($radians);

Update: Here is an example of rad2rad() in use:

use Modern::Perl;
use Math::Trig ':pi';

my $radians = 4.5 * pi;
my $radians_wrapped_by_2pi = Math::Trig::rad2rad($radians);

say 'rad2rad(', $radians, ') = ', $radians_wrapped_by_2pi;

Output:

 1:49 >perl 502_SoPW.pl
rad2rad(14.1371669411541) = 1.5707963267949

 1:49 >

Hope that helps,

[Masayoshi Fujimoto]

Good example. Thank you very much.