how to force a function exit in python code example

Example 1: how to exit a function python

#Just do return
quit = True

def example():
  if quit:
    return

print(example())
#Doesnt output anything

#Or if you want an out put from the function

def example2():
  return (1+1)

print(example2())

#Outputs 2

Example 2: python how to exit function

return None