Strings

A string is text, written inside single '...' or double "..." quotes — Python treats them identically, so pick one style and stay consistent.

Syntax

greeting = "Hello"

Example

name = "Ada"
message = f"Hello, {name}! You have {3 + 2} new messages."
print(message)
print(name.upper())
print(len(name))

Expected output

Hello, Ada! You have 5 new messages.
ADA
3

An f"..." string (an f-string) lets you embed any expression directly inside { } — this is the standard, modern way to build strings from variables in Python. Strings also come with useful built-in methods like .upper(), .lower(), and .strip() (removes surrounding whitespace).

Common mistakes

• Forgetting the f before the quote — "Hello, {name}" prints the literal text {name}, not Ada's actual name.
• Trying to combine text and a number with + directly: "Age: " + 25 raises a TypeError. Use an f-string, or convert the number with str(25) first.

Practice

Create a variable language = "Python" and print "I am learning Python!" using an f-string.

language = "Python"
print(f"I am learning {language}!")