1     if( isMatch === true ) {
2         var matchedPerson = "zj" ;
3         for( var i = 0; i < 10; i ++ ) {
4             // do something
5         }
6     }

1     var isHandsome = true ;

1     if( isLeapYear && isFebruary && day === 29 && itsYourBirthday &&
2             noPlans ) {
3         waitAnotherFourYears() ;
4     }

 1     var f1 = function() {
 2         var zj, xu, xj;
 3         var persons = [];
 4
 5         zj = "epson";
 6         xu = "scan";
 7         xj = "zoro";
 8         persons.push(zj);
 9         persons.push(xj);
10         persons.push(xu);
11
12         for( var i = 1; i < 3; i ++ ) {
13             for( var j = 0; j < 3 - i; j ++ ) {
14                 if( persons[j] > persons[j+1] ) {
15                     var temp = persons[j] ;
16                     persons[j] = persons[j+1] ;
17                     persons[j+1] = temp ;
18                 }
19             }
20         }
21     };
22
23     var f2 = function() {
24
25     };

 1      var numOfPersons = 10 ;                 //变量
 2      var getNumOfPersons = function() {      //函数
 3
 4      };
 5      var MAX_COUNT = 3.14 ;                  //常量
 6      var Person = function() {               //构造函数
 7
 8      };
 9
10      var zj = new Person() ;

1     //错误的做法
2     var text = "Here's the story, of a man
3              named Beady." ;
4
5     //正确的做法
6     var text = "Here's the story, of a man " +
7             "named Beady." ;

 1     //Interger
 2     var count = 10 ;
 3
 4     //Demical
 5     var price = 10.0 ;
 6     var price = 10.00 ;
 7
 8     //Bad Demical: Hanging demical point
 9     var price = 10. ;
10
11     //Bad Demical: Leading demical point
12     var price = .1 ;
13
14     //Bad: Octal(base 8) is deprecated
15     var num = 010 ;
16
17     //Hexadecimal(base 16)
18     var num = 0x42 ;
19
20     //E-notation
21     var num = 1e23 ;