Find and replace strings in vim on multiple lines

Question

I can do :%s///g for replacing a string across a file, or :s///

Answer 1

In vim if you are confused which all lines will be affected, Use below

 :%s/foo/bar/gc  

Change each 'foo' to 'bar', but ask for confirmation first. Press 'y' for yes and 'n' for no. Dont forget to save after that

:wq