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Like other editors, Emacs has commands for searching for occurrences of a string. The principal search command is unusual in that it is incremental; it begins to search before you have finished typing the search string. There are also nonincremental search commands more like those of other editors.
Besides the usual
replace-string command that finds all
occurrences of one string and replaces them with another, Emacs has a
more flexible replacement command called
asks interactively which occurrences to replace.
K.1 Incremental Search Search happens as you type the string. K.2 Nonincremental Search Specify entire string and then search. K.3 Word Search Search for sequence of words. K.4 Regular Expression Search Search for match for a regexp. K.5 Syntax of Regular Expressions Syntax of regular expressions. K.6 Searching and Case To ignore case while searching, or not. K.7 Replacement Commands Search, and replace some or all matches. K.8 Other Search-and-Loop Commands Operating on all matches for some regexp.