天气预报 > 教育 > 与或非是什么意思
与或非是什么意思
更新时间: 2021-03-04 23:33:54  

1、与或非一般都是指逻辑运算符。

2、逻辑运算符有与&、或|、非!三种。与/或分长/短路,为长路与&(又按位与,位运算符)、长路或|(又按位或,位运算符)、短路与&&、短路或||。

3、区别如下:长路将逻辑运算符两侧运算执行完后执行逻辑运算;短路先执行逻辑运算符左侧部分,合要求直输逻辑运算结果,不再执行右侧部分。

关键词: 什么 意思

与或非是什么意思相关经验

天气预报

最新推荐

页面:/news/view-879990/ | 耗时:0.1707 s | 内存:2.11 MB | 查询:4 | 缓存读取:3 写入:0 | 加载文件:25
select * from tbl_Articles WHERE ArticleID=879990 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=879990 LIMIT 0,1
select * from tbl_Articles_sphinx where id=879990 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(466637,449127,1094319,419031,3344627,1110245,430014,455627,1116553,471130,1305476,1087241,381865,2976915,2964226,369587,3447524,401504,399487,1081937,3266707,441885,450532,1110694,900134,417918,401765,399497,1121778,434882) ORDER BY field (ArticleID,466637,449127,1094319,419031,3344627,1110245,430014,455627,1116553,471130,1305476,1087241,381865,2976915,2964226,369587,3447524,401504,399487,1081937,3266707,441885,450532,1110694,900134,417918,401765,399497,1121778,434882)