How to select or highlight a block in Emacs?

Question

I want to select or highlight a block in emacs without using mouse but doing it from the keyboard like vim\'s visual mode. What is the easiest way to do this from a keyboard

Answer 1

Take a look at region-rectangle in emacs.

In short, you start selection like usual with Control-Space, then kill region with Control-x r k and paste (or yank) killed block with Control-x r y.