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

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

$INPUT_RECORD_SEPARATOR

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

$INPUT_LINE_NUMBER

%SIG The hash %SIG contains signal handlers for signals. For example:

IO::Handle->output_record_separator( EXPR )

$0 Contains the name of the program being executed. On some (but not all) operating systems assigning to

$$ The process number of the Perl running this script. Though you can set this variable, doing so is generally discouraged, although

${^PREMATCH} This is similar to $` ($PREMATCH) except that it does not incur the performance