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What is the use of the "re" module in Python?

The **re** module in Python provides support for working with regular expressions. A regular expression is a sequence of characters that define a search pattern. Regular expressions can be used to search, match, and manipulate strings in a concise and efficient way.

The **re** module provides various functions for working with regular expressions, including **re.search**, **re.match**, **re.findall**, **re.sub**, etc. These functions can be used to match patterns, find all matches in a string, substitute matches with new strings, etc.

Here's an example of using the **re** module to search for a pattern in a string:

import re

text = "The quick brown fox jumps over the lazy dog."
pattern = "fox"

match = re.search(pattern, text)

if match:
    print("Pattern found!")
else:
    print("Pattern not found.")
# Output: Pattern found!

In this example, the **re.search** function is used to search for the pattern **"fox"** in the string **text**. If a match is found, the **re.search** function returns a match object; otherwise, it returns **None**.

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