Python Strings

Master Python strings with slicing, methods, f-strings, and string formatting techniques.

Python Strings

Strings in python are surrounded by either single quotation marks, or double quotation marks.

'hello' is the same as "hello"

You can display a string literal with the print() function.

Multiline Strings

You can assign a multiline string to a variable by using three quotes.

String Methods

Python has a set of built-in methods that you can use on strings. Some important methods:

Method	Description
`upper()`	Returns uppercase string
`lower()`	Returns lowercase string
`strip()`	Removes whitespace
`replace()`	Replaces a substring
`split()`	Splits into a list
`find()`	Finds substring index
`count()`	Counts occurrences
`startswith()`	Checks prefix
`endswith()`	Checks suffix

String Formatting

f-strings (formatted string literals) are the modern way to format strings in Python (Python 3.6+).

Example

python

# String basics
greeting = "Hello, World!"
print(len(greeting))      # 13
print(greeting[0])        # H
print(greeting[-1])       # !
print(greeting[0:5])      # Hello
print(greeting[7:])       # World!

# String methods
text = "  Python is Amazing!  "
print(text.strip())       # "Python is Amazing!"
print(text.lower())       # "  python is amazing!  "
print(text.upper())       # "  PYTHON IS AMAZING!  "
print(text.replace("Amazing", "Powerful"))

# String splitting
words = "apple,banana,cherry".split(",")
print(words)  # ['apple', 'banana', 'cherry']

# f-strings (Python 3.6+)
name = "Alice"
age = 28
lang = "Python"
print(f"Hi, I'm {name}, age {age}, learning {lang}!")
print(f"2 + 2 = {2 + 2}")
print(f"Pi is approximately {3.14159:.2f}")

# String check methods
email = "user@example.com"
print(email.endswith(".com"))   # True
print("123".isnumeric())        # True

Try it yourself — PYTHON