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闰年能被4整除，但不能被100整除（世纪年除外）。世纪年只有在能被400整除时才是闰年。例如，
2017 is not a leap year 1900 is a not leap year 2012 is a leap year 2000 is a leap year
源代码
# Python program to check if year is a leap year or not
year = 2000
# To get year (integer input) from the user
# year = int(input("Enter a year: "))
# divided by 100 means century year (ending with 00)
# century year divided by 400 is leap year
if (year % 400 == 0) and (year % 100 == 0):
print("{0} is a leap year".format(year))
# not divided by 100 means not a century year
# year divided by 4 is a leap year
elif (year % 4 ==0) and (year % 100 != 0):
print("{0} is a leap year".format(year))
# if not divided by both 400 (century year) and 4 (not century year)
# year is not leap year
else:
print("{0} is not a leap year".format(year))输出
2000 is a leap year
您可以在源代码中更改 year 的值，然后再次运行它来测试这个程序。
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