What is the Regular Expressions and why need to used this?

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Andrew Deniel · Answer

Regular Expressions means we can say a pattern that one is an expression that specifies a set of strings. And there are lot of great use of these expressions like - 1. In complex search 2. In validation like email validation or URl validation etc in writing of rewrite rules in apache or .htaccess file 3. in file search in linux 4. in pattern matches.

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What is the Regular Expressions and why need to used this?

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