JavaScript: The Definitive Guide, Sixth Editio javaScript权威指南(第6版) pdf 文字版-文字版, javascript电子书, 和javascript 有关的电子书:

4.9 Relational Expressions

4.9 Relational Expressions


This section describes JavaScript’s relational operators. These operators test for a relationship (such as “equals,” “less than,” or “property of”) between two values and return true or false depending on whether that relationship exists. Relational expressions always evaluate to a boolean value, and that value is often used to control the flow of program execution in if, while, and for statements (see Chapter 5 ). The subsections that follow document the equality and inequality operators, the comparison operators, and JavaScript’s other two relational operators, in and instanceof.

欢迎转载,转载请注明来自一手册:http://yishouce.com/book/1/27624.html
友情链接It题库(ittiku.com)| 版权归yishouce.com所有| 友链等可联系 admin#yishouce.com|粤ICP备16001685号-1