Pattern matching is the process of checking whether a specific sequence of characters/tokens/data exists among the given data.
Regular programming languages make use of regular expressions (regex) for pattern matching.
Pattern matching is used to determine whether source files of high-level languages are syntactically correct. It is also used to find and replace a matching pattern in a text or code with another text/code. Any application that supports search functionality uses pattern matching in one way or another.
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