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a, javascript Introduction 3
1.1 use: 3
1.2 a Brief History of Javascript 3
1.3 development ECMAScript version 4
1.4 ECMAScript script language 4
two, js base 5
2.1 JS writing position 5
2.2 Note 5
2.3 5 Alert
2.4 Console control panel 6
III literal 7
3.1 digital 7
10 -a 7
3.2 8 string
IV variable 9
4.1 9 experience variable
4.2 to declare variables 9
4.3 assignment 10
4.4 variable declaration lift 11
4.5 declare multiple variables 11
V, the data type 11
5.1 data type detector 12
1: to detect the data written in the back typeof, separated 12 by a space
2: to detect data written later typeof wide number of small parcels 12
5.2 12 number The converted String
5.2 String into number 12
String to convert 14: first parameter
the second parameter: Parameter binary (hexadecimal prefix without the writing 0,0x, 0o) 14
VI operator 14
6.1 mathematical operators 15
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