$^H WARNING: This variable is strictly for internal use only. Its availability, behavior, and contents are subject to change without notice

%^H The %^H hash provides the same scoping semantic as

@+ This array holds the offsets of the ends of the last successful submatches in the currently active dynamic scope.

$] The revision, version, and subversion of the Perl interpreter, represented as a decimal of the form 5.XXXYYY, where XXX is the version /

$MATCH

$" When an array or an array slice is interpolated into a double-quoted string or a similar context such as /

$EFFECTIVE_USER_ID

$^V The revision, version, and subversion of the Perl interpreter, represented as a version object. This variable

$^W The current value of the warning switch, initially true if -w was used, false otherwise, but directly modifiable.

%+ Similar to @+ , the %+ hash allows