What are metacharacters in regular expressions, and how are they used in matching patterns?
- Characters that are ignored during pattern matching.
- Characters used only for pattern grouping.
- Characters used to represent literals in a regular expression.
- Special characters that give special meaning to a search pattern, allowing more flexible and powerful matching.
Metacharacters in regular expressions are special characters that provide a specific meaning to a search pattern. They allow for more flexible and powerful matching by representing concepts like repetition, alternatives, and grouping in the pattern.
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