age: int
name: str
height: float
is_human: bool

We can add a colon and then we can specify the data type of this particular input.

def police_check(age: int):
	if age > 18:
		can_drive = True
	else:
		can_drive = False
	return can_drive

if police_check(18):
	print("You may pass")
else:
	print("Pay a fine")

Type Hint

• You can also specify the data type of the output of a function, and you do that by creating a little arrow with a hyphen and an angle bracket.
• It's a feature that we got relatively recently from Python
• Help you spot potential bugs and keep your code safer and spend less time debugging and more time writing code.

def greeting(name: str) -> str:
	return 'Hello' + name

def police_check(age: int) -> bool:
	if age > 18:
		can_drive = True
	else:
		can_drive = False
	return can_drive

if police_check(18):
	print("You may pass")
else:
	print("Pay a fine")