Perl Console is a light program that lets you evaluate Perl code
interactively. It uses Readline for grabbing input and provides
completion with all the namespaces loaded during your session.

This is pretty useful for Perl developers that write modules. You can
load a module in your session and test a function exported by the
module.

Readline is used to grab user input and provides then all the facilities
your are used to : completion, key bindings, ...