After following, you can keep track of his dynamic information in a timely manner
Courses in the relevant section：Data classification methods: ordered lists and unordered lists
倒叙 start=“”3“”设置起始序号
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Courses in the relevant section：Basic syntax of JavaScript (identifiers/variables)
var name="zhi" name
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Courses in the relevant section：JavaScript data types
var x typeof x "undefined"
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Courses in the relevant section：Mutual conversion of data types in JavaScript
Boolean("123") true var a="134" undefined var b=Boolean(a) undefined
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Courses in the relevant section：Overview of operators in JavaScript
var x=8,y=9 undefined x==8&&y==8 false x==8&&y>8 true x==8||y==8 true !(x==8||y==8) false
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Courses in the relevant section：JavaScript array type (Array)
var a=[1,3,5,2] undefined a (4) [1, 3, 5, 2] a[3] 2 var b=new Array(8,8,6,7,6) undefined b (5) [8, 8, 6, 7, 6] b[4] 6
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