Strings — Text Manipulation

Strings are sequences of characters. Immutable in Python.

Creating strings:

s1 = 'single quotes'
s2 = "double quotes"
s3 = """triple quotes
for multi-line"""

Essential string methods:

s = "Hello World"
s.upper()          # "HELLO WORLD"
s.lower()          # "hello world"
s.strip()          # removes whitespace
s.replace("World", "Python")  # "Hello Python"
s.split(" ")       # ["Hello", "World"]
len(s)             # 11

f-strings (use these):

name = "Alice"
age = 30
print(f"My name is {name} and I am {age} years old.")

Indexing & slicing:

s = "Python"
s[0]     # "P"
s[-1]    # "n"
s[1:4]   # "yth"
s[::-1]  # "nohtyP" (reversed)

Reference:

Wikipedia: String

https://en.wikipedia.org/wiki/String_(computer_science)