in python f then string meaning

1num_01, num_02, num_03 = 1, 2, 3
2print(f"Numbers : {num_01}, {num_02}, {num_03}")
3
4"""
5>>> Numbers: 1, 2, 3
6"""

1>>> import datetime
2>>> name = 'Fred'
3>>> age = 50
4>>> anniversary = datetime.date(1991, 10, 12)
5>>> f'My name is {name}, my age next year is {age+1}, my anniversary is {anniversary:%A, %B %d, %Y}.'
6'My name is Fred, my age next year is 51, my anniversary is Saturday, October 12, 1991.'
7>>> f'He said his name is {name!r}.'
8"He said his name is 'Fred'."
9