How can I change the case of the text using vim?

Question

$ cat keys
1 auto
2 break
3 case
4 char
5 const
6 continue
$

Using vim, what is the quickest way to toggle the case of all the text to get this?

1 AUTO
2 BREAK
3 CASE
4 CHAR
5 CONST
6 CONTINUE

Answer 1

I'm not sure it's the quickest, but what I would do is type this:

gggUG

See

:help gU

Answer 2

You could also do:

SHIFT + V
SHIFT + G
SHIFT + ~

Note: Text will be converted to UPPER case if all chars are in lower case.