Boolean 英 [ˈbuːliən] 美 [ˈbuːliən]adj. 布尔逻辑体系的(分别以1和0代指是和非)牛津词典 adj.布尔逻辑体系的（分别以1和0代指是和非）connected with a system, used especially in computing and electronics , that uses only the nu...
Boolean一词，是根据19世纪英国数学家George Boolean(1815–1864)的名字而得，George Boolean为现代布尔代数之父。布尔型常量仅有两个值：真和假，分别用标准常量名TRUE和FALSE表示。它们的序号分别为1和0。用于布尔量的运算有布尔运算符（或称逻辑运算符），它们是：and(与)、or(或)、not(非)，xor...
比如，and运算本来是一个逻辑运算符，但整数与整数之间也可以进行and运算。举个例子，6的二进制是110，11的二进制是1011，那么6 and 11的结果就是2，它是二进制对应位进行逻辑运算的结果（0表示False，1表示True，空位都当0处理）。2、 boolean 变量存储比位运算更长。boolean 数据类型 boolean 变量...
A Boolean expression consists of Boolean variables and Boolean operators. The Boolean expression in the Boolean variables x1,x2,…,xn are defined recursively through the basic clause that states that 0,1,x1,x2,…,xn are Boolean expressions, and the recursive clause that states that the sum an...
二元操作符 AND 和 OR 两个逻辑位之间的关系就变的复杂一些了,有 0 0,0 1,1 0,1 1 四种可能的初始状态,这四种状态再结合2种不同的结果(0和1),就可以排列组合出16种可能的操作,其中最常见的是 AND 和 OR 所有二元操作符详情(一共16种):
aA boolean (0 or 1) attribute that indicates whether adjacent bytes of numeric types have to be swapped (conversion between big-endian and little-endian) 表明的一个布尔(0或1)属性数字类型毗邻字节是否必须被交换(转换在大endian和小endian之间)[translate]...
直到1975年,微软的Altair BASIC,才将AND/OR/NOT运算符添加进来,并且被描述为LOGICAL AND BITWISE(逻辑和按位),并且对于IF的任何非零表达式执行THEN子句。与此同时,False被定义为0(0x0000),True被定义为-1(0xFFFF)。 三、为何要将True映射为-1,而不是非0?
The logical Boolean operators perform logical operations withbooloperands. The operators include the unary logical negation (!), binary logical AND (&), OR (|), and exclusive OR (^), and the binary conditional logical AND (&&) and OR (||). ...
The X++ literal false is the integer value 0, and true is 1.The following table lists several expressions and indicates whether they evaluate to true or false.展開資料表 Expression Boolean value 1 True 44 True true True (false == 0) True (true == 1) True (true == 8) False false...
aA boolean (0 or 1) attribute that indicates whether the telegram ID is in ASCII or binary format. The default value is 0 (binary format). If telIDisAscii is 1, the telegram ID must not contain spaces, e.g. "my ID" is not a valid telegram ID, but "myID" and " myID" are (no...