JavaScript web page programming ------ array knowledge

JavaScript web page programming ------ array-related knowledge 1. The length of arrays in Js can automatically increase

2. The Array Function in Js is equivalent to the integration of arrays and collections in Java.

3. var arr = [,-, 10]; // correct. Note that the initial value of Java is enclosed by braces, while that of Js is enclosed by brackets.

Var arr [] = [,-, 10]; // incorrect. It cannot be declared as arr [] ---- it cannot contain brackets when declaring

4. traverse the Array

5. arrays in Js can store data of different data types