What data type is regular expression?

Regular expression itself is not a specific data type, but a string rule used to describe and process string patterns. In programming languages, regular expressions are usually represented as string types. When using regular expressions, you need to pass them as strings to the corresponding regular expression engine or function. The engine or function will perform matching, search, and replacement operations according to the rules of the regular expression.

Operating system for this tutorial: Windows 10 system, Dell G3 computer.

Regular expression itself is not a specific data type, but a rule that describes a string pattern. In programming languages, regular expressions are usually represented as string types. That is, a regular expression can be represented as a string, which contains specific syntax and rules for describing patterns for matching and processing strings.

When using a regular expression, you need to pass it as a string to the corresponding regular expression engine or function. The engine or function will perform matching, search, replacement and other operations according to the rules of the regular expression.

For example, in Java, regular expressions are usually represented by strings and processed through the Pattern class and the Matcher class. In C, you can also use strings to represent regular expressions and operate them through the regex class and related functions.

Therefore, regular expression itself is not a specific data type, but a string rule used to describe and process string patterns.

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