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(readline.info.gz) Readline Arguments

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 1.2.4 Readline Arguments
 ------------------------
 
 You can pass numeric arguments to Readline commands.  Sometimes the
 argument acts as a repeat count, other times it is the sign of the
 argument that is significant.  If you pass a negative argument to a
 command which normally acts in a forward direction, that command will
 act in a backward direction.  For example, to kill text back to the
 start of the line, you might type `M-- C-k'.
 
    The general way to pass numeric arguments to a command is to type
 meta digits before the command.  If the first `digit' typed is a minus
 sign (`-'), then the sign of the argument will be negative.  Once you
 have typed one meta digit to get the argument started, you can type the
 remainder of the digits, and then the command.  For example, to give
 the `C-d' command an argument of 10, you could type `M-1 0 C-d', which
 will delete the next ten characters on the input line.
 
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