The best answers to the question “How to do case insensitive search in Vim” in the category Dev.
I’d like to search for an upper case word, for example COPYRIGHT in a file. I tried performing a search like:
/copyright/i # Doesn't work
but it doesn’t work. I know that in Perl, if I give the
i flag into a regex it will turn the regex into a case-insensitive regex. It seems that Vim has its own way to indicate a case-insensitive regex.
As well as the suggestions for
ignorecase, I find the
smartcase very useful. If you search for something containing uppercase characters, it will do a case sensitive search; if you search for something purely lowercase, it will do a case insensitive search. You can use
\C to override this:
:set ignorecase :set smartcase /copyright " Case insensitive /Copyright " Case sensitive /copyright\C " Case sensitive /Copyright\c " Case insensitive
:help /\c :help /\C :help 'smartcase'
You can use the
\c escape sequence anywhere in the pattern. For example:
/copyright\c or even
To do the inverse (case sensitive matching), use
\C (capital C) instead.
You can issue the command
and after that your searches will be case-insensitive.
You can set the
ic option in Vim before the search:
To go back to case-sensitive searches use:
ic is shorthand for