Check whether a particular year is leap year or not.

leap_year.py

while(True):
    x = int(input("Please input a particular year:"))
    if x % 100 == 0:
        if x % 400 == 0:
            print(x,"is a leap year!")
    elif x % 4 == 0:
        print(x,"is a leap year!")
    else:
        print(x,"is not a leap year!")