大爽Python入门公开课教案 点击查看教程总目录 1 布尔值介绍 从判断说起 回顾第一章介绍的简单的判断 >>> x = 10 >>> if x > 5: ... print("x is greater than 5") 重点来看下if x > 5:这一句. 这一句可以分为两步 x > 5: 本质是一个运算式,其值是一个布尔值. if根据布尔值来判断. 具体如下 >>> x = 10 >>> x
前段时间有在数据库以及程序之间使用到布尔(bool,Boolean)值的问题. 比如在SQL中,你想判断记录是否存? 通常你会这样写: FROM [dbo].[SixSResponsiblePerson] WHERE [SixS_nbr] = @SixS_nbr AND [UsersId] = @UsersId) SELECT @IsExists 或者你可以按照Insus.NET的习惯写法: FROM [dbo].[SixSResponsiblePerson] WHERE [SixS_nbr]
先看看如下代码: public class Test { public static void test() { boolean a = true; boolean b = false; if (a | b) { System.out.println("|"); } if (a & b) { System.out.println("&"); } } public static void main(String[] args){ test(); } }
boolean attribute(布尔值属性) boolean attribute HTML - Why boolean attributes do not have boolean value? Boolean HTML Attributes HTML Boolean Attributes A number of attributes are boolean attributes. The presence of a boolean attribute on an ele