"""闰年：能被4整除，并且不能被100整除或者能被4整除，并且又能被400整除"""while 1: this_time = int(input("请输入年份：")) #条件1 condition1 = this_time%4 == 0 and this_time%100 != 0 #条件2 condition2 = this_time%4 == 0 and this_time%400 == 0 if (condition1 or condition2): print("%d年是闰年"%(this_time)) else: print("%d年不是闰年"%(this_time))