DB<159> $a=inf
 => "inf"

  DB<160> --$a
 => "inf"

  DB<161> ++$a  
 => "inf"

##</code><code>##

  DB<116> use warnings;5=="inf"
 => ""

  DB<117> use warnings;5=="WhatEver"
Argument "WhatEver" isn't numeric in numeric eq (==) at (eval 47)[multi_perl5db.pl:644] line 2.