2. Tutorial 2: javascript operators, expressions, and statements

This part is slightly different from java, so be careful when learning

1. operators:

1) arithmetic, relational, logic, value assignment, bit operations] refer to c ++ and java to learn why it starts with "java !).

2) dot operations, new operations, patent operations on objects, no need to worry!

3) typeof (variable)], type judgment operator.

4) operator precedence]. This is boring for development. Please check it yourself!

2. expression:

Operator + common variables, and "Combination" of results, the result type is not separated from the "first lesson" content. It is the basic unit of a "statement.

3. Statement:

The feature ending with ";" only requires line breaks)

The statement can be summarized as follows ):

1) Value assignment, declaration, and definition of variables

2) call a function or Method

3) return of a function or Method

4) define the loop or branch structure

5) structure definition of functions or methods

4. Branch Structure:

1) if... else

2) switch (Number)... case (value 1)... case (value 2)... default...

5. Loop Structure:

1) for (var I = 0; I <100; I ++) {...} // counting cycle

2) while (expression ){...}

Do {} while (expression );

3) for (var m in array) {...} // corresponds to java's for... each

This article from the "Yu yu" blog, please be sure to keep this source http://johnyu.blog.51cto.com/7838287/1299618