LEARNING JAVASCRIPT - Trang 8

3.

Literals, Variables, Constants, and Data Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Variables and Constants 33

Variables or Constants: Which to Use? 35

Identifier Names 35

Literals 36

Primitive Types and Objects 37

Numbers 38

Strings 40

Escaping 40

Special Characters 41

Template Strings 42

Multiline Strings 43

Numbers as Strings 44

Booleans 44

Symbols 45

null and undefined 45

Objects 46

Number, String, and Boolean Objects 48

Arrays 49

Trailing Commas in Objects and Arrays 50

Dates 51

Regular Expressions 51

Maps and Sets 52

Data Type Conversion 52

Converting to Numbers 52

Converting to String 53

Converting to Boolean 53

Conclusion 54

4.

Control Flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

A Control Flow Primer 55

while Loops 59

Block Statements 59

Whitespace 60

Helper Functions 61

if…else Statement 62

do…while Loop 63

for Loop 64

if Statement 65

Putting It All Together 66

Control Flow Statements in JavaScript 68

Control Flow Exceptions 68

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