Insert at the end of line
A
append at the cursor
a
Insert at the begining of line
I
move to the next word
w
move to the 3rd word
3w
delete 3 lines
3dd
delete 5 chars after cursor
5x
delete 3 chars before cursor
3X
delete charactes under cursor till the end of line
D
Move by end of words
e
Move to begining of line
0
Move to the end of file
G
Move to the begining of file
gg
Move to the line 287
287G
Jump to matching bracket
% while standing on a bracket
Forward search
?word
Backward search of “function”
/function
open a line below cursoe
o
open a line above the cursor
O
move by words backward
b