PEP 498 introduces a new kind of string literals: f-strings, or formatted string literals.

Formatted string literals are prefixed with 'f' and are similar to the format strings accepted by str.format(). They contain replacement fields surrounded by curly braces. The replacement fields are expressions, which are evaluated at run time, and then formatted using the format() protocol

Example:
>>> name = "Fred"
>>> f"He said his name is {name}."
'He said his name is Fred.'


Example:
val1 = 'tutorials'
val2 = 'learning'
print(f"{val1}for is a website for {val2}.")
output : tutorialsfor is a website for learning.
 

Example:
name = 'Saif'
age = 30
print(f"Hello, My name is {name} and I'm {age} years old.")
output : Hello, My name is saif and I'm 30 years old.