If gawk is compiled with
the GNU Readline library, you can take advantage of that library’s
command completion and history expansion features. The following types
of completion are available:
Command names.
Source file names. Relevant commands are
break,
clear,
list,
tbreak,
and
until.
Non-numeric arguments to a command.
Relevant commands are enable and info.
Global variable names, and function arguments in the current context
if the program is running. Relevant commands are
display,
print,
set,
and
watch.