# New Ticket Created by Zefram # Please include the string: [perl #128395] # in the subject line of all future correspondence about this issue. # <URL: https://rt.perl.org/Ticket/Display.html?id=128395 >
> my $a = 0.Num 0 > my $b = -$a -0 > $a 0 > $b -0 > $a.WHICH Num|0 > $b.WHICH Num|-0 > atan2($a, -1) 3.14159265358979 > atan2($b, -1) -3.14159265358979 > $a === $b True These two values, the two floating point zeroes, are distinct values, as shown by their stringification, .WHICH, and atan2 branch cut behaviour. The === comparison is producing the wrong answer, claiming that they're the same value. They are of course correctly ==, but === is making a different kind of comparison. In the related case of NaN compared to NaN, === correctly says that NaN is the same value as itself, despite it not being == to itself. -zefram
