请问下这两种写法有什么区别？

秋***

if(year%4==0&&year%100!=0||year%400==0)

和
if(year%4==0)

林***

https://www.imooc.com/wenda/detail/610168
https://www.imooc.com/wenda/detail/610169
https://www.imooc.com/wenda/detail/610170
https://www.imooc.com/wenda/detail/610172
https://www.imooc.com/wenda/detail/610176
https://www.imooc.com/wenda/detail/610184
https://www.imooc.com/wenda/detail/610185
https://www.imooc.com/wenda/detail/610186
https://www.imooc.com/wenda/detail/610187
https://www.imooc.com/wenda/detail/610188
https://www.imooc.com/wenda/detail/610189
https://www.imooc.com/wenda/detail/610190
https://www.imooc.com/wenda/detail/610191
https://www.imooc.com/wenda/detail/610192
https://www.imooc.com/wenda/detail/610193
https://www.imooc.com/wenda/detail/610194
https://www.imooc.com/wenda/detail/610195
https://www.imooc.com/wenda/detail/610196
https://www.imooc.com/wenda/detail/610197
https://www.imooc.com/wenda/detail/610198
https://www.imooc.com/wenda/detail/610199
https://www.imooc.com/wenda/detail/610200
https://www.imooc.com/wenda/detail/610201
https://www.imooc.com/wenda/detail/610202
https://www.imooc.com/wenda/detail/610203
https://www.imooc.com/wenda/detail/610204
https://www.imooc.com/wenda/detail/610205
https://www.imooc.com/wenda/detail/610206
https://www.imooc.com/wenda/detail/610207
https://www.imooc.com/wenda/detail/610208
https://www.imooc.com/wenda/detail/610209
https://www.imooc.com/wenda/detail/610218
https://www.imooc.com/wenda/detail/610225
https://www.imooc.com/wenda/detail/610230
https://www.imooc.com/wenda/detail/610233
https://www.imooc.com/wenda/detail/610234
https://www.imooc.com/wenda/detail/610235
https://www.imooc.com/wenda/detail/610238
https://www.imooc.com/wenda/detail/610239
https://www.imooc.com/wenda/detail/610240
https://www.imooc.com/wenda/detail/610241
https://www.imooc.com/wenda/detail/610244
https://www.imooc.com/wenda/detail/610249
https://www.imooc.com/wenda/detail/610250
https://www.imooc.com/wenda/detail/610255
https://www.imooc.com/wenda/detail/610256
https://www.imooc.com/wenda/detail/610257
https://www.imooc.com/wenda/detail/610258
https://www.imooc.com/wenda/detail/610269
https://www.imooc.com/wenda/detail/610280
https://www.imooc.com/wenda/detail/610281
https://www.imooc.com/wenda/detail/610282
https://www.imooc.com/wenda/detail/610306
https://www.imooc.com/wenda/detail/610307
https://www.imooc.com/wenda/detail/610315
https://www.imooc.com/wenda/detail/610317
https://www.imooc.com/wenda/detail/610326
https://www.imooc.com/wenda/detail/610340
https://www.imooc.com/wenda/detail/610352
https://www.imooc.com/wenda/detail/610353
https://www.imooc.com/wenda/detail/610354
https://www.imooc.com/wenda/detail/610355
https://www.imooc.com/wenda/detail/610356
https://www.imooc.com/wenda/detail/610357
https://www.imooc.com/wenda/detail/610358

东***

闰年的判断有两种：第一种是能被4整除而不能被100整除，第二种是能被400整除，注意，第一种是连一起的，所以用&&（与），而||（或）表是另外一种情况，随便满足哪一种都可以得出是闰年的结论
第一个明显就是闰年的判断。
第二个，判断是不是4的倍数。。。。

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请问下这两种写法有什么区别？

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