常见数据类型
boolean; number; string; object; undefined
代码示例
常见数据类型<!DOCTYPE html><html lang="en"><head> ???<meta charset="UTF-8"> ???<title></title> ???<script type="text/javascript"> ???????function f() { ???????} ???????var s = ""; ???????s+="typeof true:\t\t\t"+typeof true+"\n" ???????s+="typeof 3.3:\t\t\t\t"+typeof 3+"\n" ???????s+="typeof ‘hello‘:\t\t\t"+typeof ‘hello‘+"\n" ???????s+="typeof f :\t\t\t\t"+typeof f+"\n"; ???????s+="typeof new Array(1,2,):\t"+typeof new Array(1,2)+"\n" ???????s+="typeof [1,3]:\t\t\t"+typeof [1,3]+"\n" ???????s+="typeof null:\t\t\t"+typeof null+"\n" ???????s+="typeof undefined:\t\t"+typeof undefined+"\n" ???????console.log(s) ???????/*结果如下： ???????typeof true: ???????????boolean ???????typeof 3.3: ????????????number ???????typeof ‘hello‘: ????????string ???????typeof f : ?????????????function ???????typeof new Array(1,2,): object ???????typeof [1,3]: ??????????object ???????typeof null: ???????????object ???????typeof undefined: ??????undefined*/ ???</script></head><body></body></html>JS数据类型
原文地址：https://www.cnblogs.com/yldf/p/9385384.html