readline: Numeric Arguments
1.4.5 Specifying Numeric Arguments
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'digit-argument (M-0, M-1, ... M--)'
Add this digit to the argument already accumulating, or start a new
argument. 'M--' starts a negative argument.
'universal-argument ()'
This is another way to specify an argument. If this command is
followed by one or more digits, optionally with a leading minus
sign, those digits define the argument. If the command is followed
by digits, executing 'universal-argument' again ends the numeric
argument, but is otherwise ignored. As a special case, if this
command is immediately followed by a character that is neither a
digit nor minus sign, the argument count for the next command is
multiplied by four. The argument count is initially one, so
executing this function the first time makes the argument count
four, a second time makes the argument count sixteen, and so on.
By default, this is not bound to a key.
Info Catalog
readline: Commands For Killing
readline: Bindable Readline Commands
readline: Commands For Completion