Python Tutorial 4.5 - String Operations in Python

Welcome to the “String Operations in Python” tutorial!

Overview

Strings are immutable sequences of characters with many built‑in methods for manipulation.

Creating Strings

greeting = "Hello, World!"

Common Operations

• Concatenation and Repetition:

  "Hi " + "there"     # "Hi there"
  "la" * 3            # "lalala"
  

• Indexing & Slicing:

  greeting[0]         # "H"
  greeting[7:12]      # "World"
  

• String Methods:

  greeting.lower()    # "hello, world!"
  greeting.upper()    # "HELLO, WORLD!"
  greeting.split(",") # ["Hello", " World!"]
  greeting.strip("!") # "Hello, World"
  

• Formatting:

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

Key Takeaways

• Strings are powerful and support rich methods.
• They are immutable—operations return new strings.
• f‑strings provide concise formatting.

Happy coding!