What is the purpose of f-strings?

F-strings, or formatted string literals, are a feature in Python that allows for easy and readable string formatting. They were introduced in Python 3.6. The main purposes of f-strings are:

1. Interpolation: You can embed expressions inside string literals, using curly braces {}. This allows you to include variable values directly within the string.

   Example:

   name = "Alice"
   greeting = f"Hello, {name}!"

2. Readability: F-strings make the code cleaner and more readable compared to older formatting methods (like % formatting or str.format()).

3. Performance: F-strings are generally faster than other string formatting methods because they are evaluated at runtime and do not require additional function calls.

4. Complex Expressions: You can include more complex expressions inside the curly braces, not just variable names.

   Example:

   age = 30
   message = f"{name} is {age + 1} years old."

In summary, f-strings provide a concise and efficient way to create formatted strings in Python.