How to do case insensitive search in Vim

Question

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

User · Answer

As  huyz mention sometimes desired behavior is using case-insensitive searches but case-sensitive substitutions  My solution for that   nnoremap     c nnoremap     c   With that always when you hit   or   it will add  c for case-insensitive search

User · Answer

put this command in your vimrc file  set ic    always do case insensitive search

User · Answer

As others suggested    set ic   But the cool stuff is You can toggle such modes with    set ic

User · Answer

Some important information  if u want to find out more about the commands of vim  as mentioned below u can give a try the following steps    invoke the command  quot help quot  follow by a space and then complete the word with TAB key  once u find the right command press return key    help ignorecase   information like the following will be displayed      you will be able to move forward and backward and also watch the short command  such as the case of  quot ignorecase quot     ic     In addition  another short example could be the case of  smartcase    scs  and some more       In order to leave of the documentation just type  quot  q quot  as usual and you will return to  quot command mode quot      q  I really hope the information provided would be helpful for someone  Best regards

User · Answer

Vim have 2 modes  1 edit mode   normal mode  Esc     Search will work for normal mode     c for case sensitive    csearch

User · Answer

The good old vim grep  command     vimgrep  example c   amp      c for case insensitive  C for case sensitive   is to search in the current buffer

User · Answer

You can use the  c escape sequence anywhere in the pattern  For example     ccopyright or  copyright c or even  copyri cght  To do the inverse  case sensitive matching   use  C  capital C  instead

User · Answer

As well as the suggestions for  c and 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 and  C to override this    set ignorecase  set smartcase  copyright        Case insensitive  Copyright        Case sensitive  copyright C      Case sensitive  Copyright c      Case insensitive   See    help   c  help   C  help  smartcase

User · Answer

By default  all searches in vi are case-sensitive  To do a case-insensitive search  go into command mode  press Escape   and type-  set ignorecase You can also type -  set ic    as an abbreviation  To change back to case-sensitive mode  type-  set noignorecase or  set noic   in command mode

User · Answer

You can use in your vimrc those commands    set ignorecase - All your searches will be case insensitive set smartcase - Your search will be case sensitive if it contains an uppercase letter   You need to set ignorecase if you want to use what smartcase provides    I wrote recently an article about Vim search commands  both built in command and the best plugins to search efficiently

User · Answer

You can set the ic option in Vim before the search    set ic   To go back to case-sensitive searches use    set noic   ic is shorthand for ignorecase

User · Answer

You can issue the command   set ignorecase   and after that your searches will be case-insensitive

User · Answer

I prefer to use  c at the end of the search string    copyright c

User · Answer

To switch between case sensitive and insensitive search I use this mapping in my  vimrc  nmap  lt F9 gt   set ignorecase  ignorecase

User · Answer

You can set ignorecase by default  run this in shell  echo  set ic   gt  gt     vimrc

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