String Methods

Strings come with dozens of built-in methods, the tools that let you clean up messy input, search text, and reshape it. These are the workhorses behind form validation, search boxes, and data cleaning.

What You'll Learn

• Changing case and trimming whitespace
• Searching, counting, and replacing text
• Splitting text into a list and joining it back
• Checking what a string contains

Case Methods

Strip Whitespace

strip() removes spaces from both ends, which is essential for cleaning up typed input:

Search and Replace

Split and Join

split() breaks a string into a list; join() glues a list back into a string. This pair is everywhere in real code:

Checking Contents

These return True or False, which is handy for validation:

Chaining Methods

Because each method returns a new string, you can chain them. This one line cleans and standardizes a name:

You will use exactly this pattern in the next project.

Key Takeaways

• Case: upper(), lower(), title()
• Clean: strip() removes surrounding whitespace
• Search: replace(), count(), startswith(), in
• Reshape: split() to a list, join() back to a string
• Check: isdigit(), isalpha(), isalnum()
• Methods return new strings, so you can chain them