Please tell the error in code below, as seems as perfectly fine as it's alternative.

Please tell why the below code is considered incorrect?

Code:def is_leap(year):
leap = False

# Write your logic here
if year%400==0 :
leap = True
elif year%4 == 0 and year%100 != 0:
leap = True
return leap

year = int(input())
print(is_leap(year))If asked for, can provide link of where it has been marked as incorrect.

The alternative provided is :
Code:def is_leap(year):
leap = False

if (year % 4 == 0) and (year % 100 != 0):
# Note that in your code the condition will be true if it is not..
leap = True
elif (year % 100 == 0) and (year % 400 != 0):
leap = False
elif (year % 400 == 0):
# For some reason here you had False twice
leap = True
else:
leap = False

return leapBut, I see nothing gained, except redundant code.

Also, ran the stated (earlier) code, and gives correct results.