Leap Year Issue

[spalisetty06]

Hello,
I am facing an issue when I use Years' like 100, 1000. I am not sure, why is this happening.

print("***********Leap Year**************")
Year = int(input("Please enter an year to see if it is a Lear Year "))
print("Year entered is ", Year)
while Year!=0:
    if(Year % 4 == 0):
        if(Year % 100 !=0 or Year % 400 == 0):
            print(f'{Year} is a Leap Year')
            Year = int(input("Please enter an year to see if it is a Lear Year "))
            print(Year)
    else:
        print("Not a Leap Year")
        Year = int(input("Please enter an year to see if it is a Lear Year "))
        print(Year)

Output:
Please enter an year to see if it is a Lear Year 400
Year entered is  400
400 is a Leap Year
Please enter an year to see if it is a Lear Year 100
100

Process finished with exit code -1