${^UTF8CACHE} This variable controls the state of the internal UTF-8 offset caching code. 1 for on (the default), 0 for off, -1 to debug the

$. Current line number for the last filehandle accessed. Each filehandle in Perl counts the number of lines

$^I The current value of the inplace-edit extension. Use

${^CHILD_ERROR_NATIVE} The native status returned by the last pipe close, backtick (`` )

@LAST_MATCH_START

$SUBSEP

$^R The result of evaluation of the last successful (?{ code }) regular expression assertion (see

$PERLDB

$FORMAT_PAGE_NUMBER

$< The real uid of this process. You can change both the real uid and the effective uid at the same time by using