Final answer:
The regex 'x\{n\}' searches for exactly n occurrences of the character 'x' in a string, where 'n' is a specific number. It is a part of regular expressions used for meticulous text processing and pattern matching in programming.
Step-by-step explanation:
The regex 'x\{n\}' is a notation used in regular expressions to match exactly n occurrences of the preceding character 'x'. The 'n' must be replaced with a specific number that represents how many times you expect 'x' to appear consecutively in the string you are searching through. For example, if you use 'a\{3\}' it will match exactly 'aaa' in the input string, meaning it will search for a sequence where the letter 'a' appears three times in a row.
Regular expressions are a powerful tool in text processing and are used across various programming languages for searching, replacing, and manipulating strings according to specific patterns. Understanding how to construct and interpret regex can save time and increase efficiency in tasks such as data validation, parsing, and string formatting.