python f in front of string concatenation code example

Example 1: f string in python

# f-strings are short for formatted string like the following
# you can use the formatted string by two diffrent ways
# 1
name = "John Smith"
print(f"Hello, {name}")		# output = Hello, John Smith

# 2
name = "John Smith"
print("Hello, {}".format(name))		# output = Hello, John Smith

Example 2: not using f string in python

>>> "Hello, {1}. You are {0}.".format(age, name)
'Hello, Eric. You are 74.'