the GNU ReadLine/History Library: perlsh(1) libreply-perl V:0, I:0 171 REPL for Perl: reply(1) libdevel-repl-perlV:0, I:0 237 REPL for Perl: re.pl(1) python3 V:718, I:953 81 Python: python3(1) and html accommodates bash-like interactive environment. For testing code for perl, try REPL environment for Perl which accommodates Python-like REPL (=READ + EVAL + PRINT + LOOP) environment for Perl. 12.2.2 GUI program