Command for toggling line numbers in vi

Question

I know

:set number 

and

:set nonumber 

I want to know whether there is any command in vi/vim

:set togglenumber 

to display line number if the line numbers is not showing or hiding line numbers if line numbers is showing.

Answer 1

You can use (on VIM at least):

:set invnumber

More Info:

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

source: http://vim.wikia.com/wiki/Managing_set_options#Boolean_options

Answer 2

In vim, many options support this set pattern, (for example, foo):

"enable the option set foo  "disable it set nofoo  "toggle the option set foo!  "get option's current value set foo? 

for number, map a key to :set nu! would be ok.