Why doesn't the function read the entered value with input()?

Question

Python

Why does it throw an error here: NameError: name 'y' is not defined ?

def f():
  y = input()

f()

print(y)

Answer 1

y is defined locally in the function and does not exist outside of it. If you want, you can write in a function
return input()
AND then do
y = f()