Vim — replace ‘foo’ by ‘bar’ on lines NOT starting with ‘character’

Question

In Vim regular expression, I know it is possible to replace foo by bar on all lines starting with % using

:g/^%/s/foo/bar/g

but I want to replace foo by bar on all lines NOT starting with %. Is there a way to easily do so?

Answer 1

Try :vglobal:

:v/^%/s/foo/bar/g

Answer 2

You can just negate the % character using character class: -

:g/^[^%]/s/foo/bar/g

[^%] match any character except %, at the start of the string.