Lesson 15 / 49
String Methods
Clean and search text with immutable string methods such as strip, upper, replace and find.
Everyday methods
Case, whitespace and search helpers cover most everyday text cleanup.
s = " Hello Python "
print(s.strip())
print(s.upper())
print(s.lower().strip().startswith("hello"))
print(s.replace("Python", "World"))Strings are immutable
Every string method returns a new string — the original never changes. That's what "immutable" means.