What is f string literal ?

Also called “formatted string literals,” f-strings are string literals that have an f at the beginning and curly braces containing expressions that will be replaced with their values. The expressions are evaluated at runtime and then formatted using the __format__ protocol.ython f-strings is introduced to have minimal syntax for string formatting. The expressions are evaluated at runtime. If you are using Python 3.6 or higher version, you should use f-strings for all your string formatting requirements.