"0 but true" is (a bit) interesting: 
use strict;
use warnings;

print "0 but true"  ? "true\n" : "false\n";
print "0 but true" + 0 ? "true\n" : "false\n";
print "0 but true" + 1 ? "true\n" : "false\n";

[download]
No warnings using numeric addition on a string, despite the 'use warnings'. Also the second case is unexpected. Shouldn't 'True' + 1 be true?

In reply to Re: What is true and false in Perl? by bangers
in thread What is true and false in Perl? by root

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