How to make the Vim editor permanently display line numbers in C language

In the Linux environment Editor has VI, VIM, gedit and so on.

After entering these editors, to make it easier for us to need the editor to display the current line number, the editor will not display the line number by default.

There are two ways we can solve this:

The first is, manual display: Input in vim command line mode: Set Nu

Cancel display: Input in vim command line mode: Set Nonu

The second is to permanently display automatically: We modify a configuration file.

We enter the command: Vim ~/.VIMRC

Open is an empty file, we add set Nu, save exit, again into the Vim editor, will automatically show the travel number.

How to make the Vim editor permanently display line numbers in C language