Explain f-strings.

F-strings, or formatted string literals, are a feature in Python introduced in version 3.6. They allow you to embed expressions inside string literals, using curly braces {}. To create an f-string, you prefix the string with the letter f or F.

Here's how f-strings work:

Basic Usage: You can include variables directly in the string.
Expressions: You can also include expressions that will be evaluated at runtime.

Example:

name = "Labby"
age = 3
greeting = f"Hello, my name is {name} and I am {age} years old."
print(greeting)  # Output: Hello, my name is Labby and I am 3 years old.

Features:

Readability: F-strings are often more readable than other formatting methods.
Performance: They are generally faster than the older formatting methods like % formatting or str.format().

More Complex Expressions:

You can also perform operations within the curly braces:

x = 10
y = 5
result = f"The sum of {x} and {y} is {x + y}."
print(result)  # Output: The sum of 10 and 5 is 15.

F-strings provide a powerful and convenient way to format strings in Python.