How do I insert the result of a calculation directly while typing in insert mode?
<C-r>=2+2<CR>
The expression register (=) in insert mode lets you evaluate any Vimscript expression and insert the result inline.
Tag: calculator
How do I use Vim as an inline calculator with the expression register?
<C-r>=expression<CR>
The expression register ("=) evaluates Vimscript expressions and returns the result.
registers #registers #insert-mode #expression #calculator #vimscript