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  1. or download this
    # XYZ.pm
package XYZ;
...
use constant CONST => 10.10;

1;
  2. or download this
    # example.pl
use strict;
...
require XYZ;
print "PI=".$XYZ::PI."\n";
print "CONST=".XYZ::CONST."\n";
  3. or download this
    Bareword "XYZ::CONST" not allowed while "strict subs" in use at exampl
+e.pl line 13.
Execution of example.pl aborted due to compilation errors.
  4. or download this
    Name "XYZ::PI" used only once: possible typo at example.pl line 11.
PI=3.14