Strings and Formatting

Creating Strings

# Single or double quotes
name = "Python"
language = 'Programming'
Multi-line strings
poem = """ Roses are red,
Violets are blue,
Python is awesome,
And so are you! """

String Indexing

text = "Hello"
print(text[0])    # H
print(text[-1])   # o
print(text[1:4])  # ell

String Methods

text = "  Hello, Python!  "
print(text.strip())       # "Hello, Python!"
print(text.upper())       # "  HELLO, PYTHON!  "
print(text.lower())       # "  hello, python!  "
print(text.replace("Python", "World"))  # "  Hello, World!  "
print(text.split(","))    # ["  Hello", " Python!  "]

String Formatting

F-Strings (Recommended)

name = "John"
age = 30
print(f"My name is {name} and I am {age} years old")
My name is John and I am 30 years old
With formatting
price = 19.99
print(f"Price: ${price:.2f}")  # Price: $19.99

format() Method

name = "Alice"
print("Hello, {}".format(name))  # Hello, Alice

String Slicing

text = "Python"
text[:3]     # "Pyt"
text[3:]     # "hon"
text[::2]    # "Pto" (every 2nd character)
text[::-1]   # "nohtyP" (reversed)

Summary

• Strings are immutable sequences
• Methods: strip, upper, lower, replace, split
• F-strings: modern and recommended formatting

Next Lesson

In the next lesson, you'll learn about conditional statements (if/else).