How do you format a string with variables in Python?

To format a string with variables in Python, using f-strings or the str.format() method is the most modern and efficient approach. F-strings, introduced in Python 3.6, allow you to embed expressions inside string literals by using curly braces {}. For example, if you have a variable name, you can create a string like this: f"Hello, {name}!". This method is not only concise but also improves readability.

The str.format() method, available in earlier versions of Python, also provides a way to format strings. You can use placeholders in the string and then pass the variables as arguments to the format method. For instance, "Hello, {}!".format(name) effectively achieves the same result.

These techniques are preferred for their clarity and efficiency in managing complex string formatting needs compared to older methods, such as string concatenation, which can become cumbersome, especially with multiple variables.