${^WARNING_BITS} The current set of warning checks enabled by the

$^S Current state of the interpreter. $^S State ---------

$ARGV Contains the name of the current file when reading from <> .

$# $# was a variable that could be used to format printed numbers. After a deprecation cycle

$+ The text matched by the last bracket of the last successful search pattern. This is useful if you don't know which one of a set of alternative

HANDLE->format_name(EXPR)

%LAST_PAREN_MATCH

@_ Within a subroutine the array @_ contains the parameters passed to that subroutine. Inside

$? The status returned by the last pipe close, backtick (`` ) command, successful call to

${^UTF8LOCALE} This variable indicates whether a UTF-8 locale was detected by perl at startup. This information is used by perl when it's in