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Emacs also has conventional nonincremental search commands, which
require you to type the entire search string before searching begins.
`C-s RET STRING RET'
Search for STRING.
`C-r RET STRING RET'
Search backward for STRING.
To do a nonincremental search, first type `C-s RET'. This enters
the minibuffer to read the search string; terminate the string with
RET, and then the search takes place. If the string is not found, the
search command gets an error.
The way `C-s RET' works is that the `C-s' invokes incremental
search, which is specially programmed to invoke nonincremental search
if the argument you give it is empty. (Such an empty argument would
otherwise be useless.) `C-r RET' also works this way.
However, nonincremental searches performed using `C-s RET' do not
call `search-forward' right away. The first thing done is to see if
the next character is `C-w', which requests a word search. Note: Word
Forward and backward nonincremental searches are implemented by the
commands `search-forward' and `search-backward'. These commands may be
bound to keys in the usual manner. The feature that you can get to
them via the incremental search commands exists for historical reasons,
and to avoid the need to find suitable key sequences for them.
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