Eh West, JavaScript learning record ...

Because of the university curriculum, the teacher giant love ask questions, also score, casually record JS learning situation, later review what is more convenient bar ...

Start, just follow the C language to learn the way to it!

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1. Data type (This is just a bit of a mention)

1 /*2 I think there is no obvious data type in JS, only String, number, Boolean, array, object, Null, Undefined3 */4 5 vartemp = ' legth '6 7 vartemp = 18 vartemp =-3.141599 vartemp = 1e9Ten  One vartemp =false A  - varPerson { -Name: ' LWC ' theSex: ' Male ' -Age:20 - } -  + varName =NULL -  + //undefined A varname atLog (name)

2. Variable declaration

var ans

var false

var i = 0,j = 0,k = 0

var TLog (t) // this condition t is undefined

var name = ' Volvo 'var  name// This case name is still Volvo
var name = ' Volvo 'var name = ' Ben '// This case name will be re-assigned

3. Arrays

// Method 1 var ans = []// Method 2varnew Array ()

Original address: http://www.w3school.com.cn/jsref/jsref_obj_array.asp

Eh West, JavaScript learning record ...