Why the return here is an error?

Question

def is_leap(year):
if year % 4 == 0 and year %100 !=0 or year % 400 == 0:
leap = True
else:
leap = False
return leap

year = int(input())
print(is_leap(year))

Answer 1

Because return isn't inside function
example
def function:
if
else
return

Answer 2

Because return statement is Out of is_leap() scope

Here is the correct code

def is_leap(year):
if year % 4 == 0 and year %100 !=0 or year % 400 == 0:
leap = True
else:
leap = False
return leap

year = int(input())
print(is_leap(year))

Answer 3

Check indention properly