Logical Expressions

最新推荐文章于 2024-08-30 15:02:59 发布

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最新推荐文章于 2024-08-30 15:02:59 发布

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本文深入探讨了逻辑表达式的两种类型：关系表达式和布尔表达式。关系表达式基于两个值的比较返回真或假，而布尔表达式则基于多个关系表达式的组合结果返回1（真）或0（假）。布尔表达式常用于条件判断，其结果也可赋值给变量。

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A logical expression determines whether a particular condition is true. There are two kinds of logical expressions, relational and Boolean. The entities to compare determine the kind of expression.

Relational Expressions
A relational expression returns TRUE or FALSE based on the comparison of two individual values (either variables or constants).

Boolean expressions return a value of true (1) or false (0) based on the outcome of two or more relational expressions. Boolean expressions are often used in conditional expressions, which are described in Writing Conditional Expressions. You can also assign the result of a Boolean expression to a numeric or character variable, which will be set to 1 (if the expression is true) or 0 (if it is false). They are constructed using variables and constants connected by operators.
逻辑表达式分为（关系表达式和布尔表达式）

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