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This is a development version of Perl.
- #${^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 adjust-utf8ness-to-locale mode (as when run with the -CL command-line switch); see perlrun for more info on this.
This variable was added in Perl v5.8.8.