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Tip 37 Printable Monobook Previous Next

created March 7, 2001 · complexity basic · author slimzhao · version 5.7


The many ways to set a boolean option are best illustrated by a simple example. In the following, the 'number' option is used. Any boolean option, such as wrap, linebreak, diff, etc. can be set in these ways.

:set number Turn line numbers on
:set nonumber Turn line numbers off
:set invnumber
:set number!
Toggle line numbers
:set number& Set line numbers option to default value
:set number? Show value of line numbers option

Replace number with any boolean option.

For nonboolean options, :set option& also sets the option to its default value. :set option? will also work in the general case.

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