Re-recognize JavaScript-2 again.

1.JavaScript does not have the int, double in Java and C, how to recognize these types? or not supported.

Q: What do you think?

Answer: VAR supports all data types (int, double, string), depending on the value you enter

Yes, it's supported.

Yo, you don't believe it, Judge with typeof (yes, JavaScript does not have int, float, double these types, only number)

2. I want to output an "I ' don ' t ' know", too?

Q: That's not good!

Answer: Yes.

Note the string escapes \ T and other special characters

3. Say the guys who write closures, why do they like to use _this, _temp to hold variables?

Get used to it!!!

4. Why do some people like conditional judgment start with a variable to define flag = ture, or flag = False

Easy to judge and value!!!

The shorthand is as follows (Novice note)

5.Array and New Array ()

Re-recognize JavaScript-2 again.