When we say comment the line, it means add a # sign at the beginning of the line. The # will indicate the system that the line is for comment and the system would skip to read it. Whatever you write in the line after # will be treated as comment.
Anytime you are not sure which mode you are in, press Esc button to be in command mode.
Anytime you want to quit without saving, press :q! in command mode.
Would you like to comment?
Join Diigo for a free account, or sign in if you are already a member.