Is there any default key in vim to create a new line after current line and remain in normal mode?

Question

While editing code I always need this feature: create a new line after current line, move cursor to a new line (saving curent indention!) and remain in normal mode. For example (assuming █ is a cursor):

function a() {
    foon█tion()
}

After I type the command, I need to turn out like this:

function a() {
    foonction()
    █
}

I can achieve the same effect if I, for example, press <Enter><Esc> while being in Insert mode with cursor on the end of a line. The o command also acts similar, but it deletes indention after I quit insert mode. So I need a single keypress to insert one line down.

inb4 nmap: I know how to map a command for doing such thing, but I'm wondering if there is a standard way to do this.

Answer 1

Also you can use <C-o> o combo

Answer 2

There is no such key, but it turns out that we can do this - sans indentation - with four keystrokes: :pu_<Enter>

This is a vim faq question, where the answer is to use the Ex command :put:

12.15. How do I insert a blank line above/below the current line without entering insert mode?

You can use the ":put" ex command to insert blank lines. For example, try

:put =''
:put! =''

For more information, read :help :put

:put puts the text from the given register after the current line and leaves you in normal mode. :put! puts the text on a line above the current line.

The examples above are using the expression register = to send an empty string to the put command. We can trim this down by using vim's black hole register, _: :put _.

Finally, this can be abbreviated to: :pu_<Enter> and :pu!_<Enter>.

See also: :help registers.

Finally, note that this is also a feature of Tim Pope's unimpaired plugin.

From the unimpaired README:

There are linewise mappings. [<Space> and ]<Space> add newlines before and after the cursor line. [e and ]e exchange the current line with the one above or below it.