A regular expression is a sequence of characters that forms a search pattern.The search pattern can be used for text search and text replace operations.
A regular expression is a sequence of characters that forms a search pattern. When you search for data in a text, you can use this search pattern to describe what you are searching for.A regular expression can be a single character, or a more complicated pattern.Regular expressions can be used to perform all types of text search and text replace operations.
There are two methods for the string:
search() method searches a string for a specified value and returns the position of the match.
test() method searches a string for a pattern, and returns true or false, depending on the result.
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