=over =item %{^HOOK} X<%{^HOOK}> This hash contains coderefs which are called when various perl keywords which are hard or impossible to wrap are called. The keys of this hash are named after the k...

=over =item $[ X<$[> This variable stores the index of the first element in an array, and of the first character in a substring. The default is 0, but you could theoretically set it to 1 to make Pe...

=over =item $POSTMATCH =item $' X<$'> X<$POSTMATCH> X<@-> The string following whatever was matched by the last successful pattern match. (See L</Scoping Rules of Regex Variables>). Example: local ...

=over =item ${^ENCODING} X<${^ENCODING}> This variable is no longer supported. It used to hold the I<object reference> to the C<Encode> object that was used to convert the source code to Unicode. I...

=over =item %^H X<%^H> The C<%^H> hash provides the same scoping semantics as L<C<$^H>|/$^H>. This makes it useful for implementing lexically scoped pragmas. See L<perlpragma>. All the entries are ...

=over =item $# X<$#> C<$#> was a variable that could be used to format printed numbers. After a deprecation cycle, its magic was removed in Perl v5.10.0 and using it now triggers a warning: C<$# is...

=over =item $ARGV X<$ARGV> Contains the name of the current file when reading from C<< <> >>. =back

=over =item ${^UNICODE} X<${^UNICODE}> Reflects certain Unicode settings of Perl. See L<perlrun|perlrun/-C [numberE<sol>list]> documentation for the C<-C> switch for more information about the poss...

=over =item ${^WIN32_SLOPPY_STAT} X<${^WIN32_SLOPPY_STAT}> X<sitecustomize> X<sitecustomize.pl> This variable no longer has any function. This variable was added in Perl v5.10.0 and removed in Perl...

=over =item $PROGRAM_NAME =item $0 X<$0> X<$PROGRAM_NAME> Contains the name of the program being executed. On some (but not all) operating systems assigning to C<$0> modifies the argument area that...