String Methods

Python provides numerous built-in string methods for common text manipulation tasks. These methods return new strings (since strings are immutable) and don't modify the original string. Common methods include: upper() and lower() for case conversion, strip(), lstrip(), and rstrip() for removing whitespace, replace() for substituting substrings, find() and index() for searching, startswith() and endswith() for checking prefixes/suffixes, split() for breaking into lists, and join() for combining sequences into strings. There are also methods for checking string properties: isalpha(), isdigit(), isalnum(), isspace(), etc. String methods can be chained together for complex transformations. Understanding these methods is essential for data cleaning, validation, and transformation tasks. Many real-world applications involve processing text data from files, user input, or APIs, and these methods provide the tools needed to handle such tasks efficiently without external libraries.