Re: Is an SV and IV or a PV or an NV or a UV? How can I tell?

[Yary]

How about this:

use 5.010; # just for "say"
use B;

($f,$g)=(333,"xyz");
say ref B::svref_2object(\$f);
say ref B::svref_2object(\$g);

edit Devel::Peek might also help you.

[ikegami]

This will give the answer without the superfluous "B::" prefix:

use feature qw( say );
use B qw( );

my ($f,$g) = (333,"xyz");
say B::class(B::svref_2object(\$f));
say B::class(B::svref_2object(\$g));

IV
PV

Note that this returns the SV *type*. It can return "PV" even if the scalar has no PV.

use feature qw( say );
use B qw( );

$_ = 333;
"".$_;
$_ = undef;
say B::class(B::svref_2object(\$_));

PVIV

This is what the OP asked, but he probably wants to know what the scalar *has*.