Question

Perl has quite a few special variables such as @F, $!, %! … etc. Where are all Perl’s special variables documented?

Answer 1

All special variables used by Perl are documented in perldoc perlvar. You can view this document on your computer by running

perldoc perlvar

The documentation for a specific special variable can also be accessed at the command line using perldoc -v:

perldoc -v @F

You may need to escape/quote some variables to avoid interpolation by your shell:

perldoc -v '$!'

or

perldoc -v "$!"

if you are using cmd.exe.

For more information:

perldoc -h
perldoc perldoc