Instructions for using date objects, array objects, and two-dimensional arrays in JavaScript_Basic knowledge

1. Date object

Format: Date object name=new Date([date parameter])
Date parameters: 1. Omitted (most commonly used)
                                                                                                                                                                                                                                                                                               

For example: today=new Date(“October 1,2008 12:00:00”);

3. Numerical format: year, month, day, [hour, minute, second]

For example: today=new Date(2008,10,1);

2. Array object

Create array object:

Format 1: Array object name=new Array([number of elements])

Format 2: Array object name=new Array([[Element 1][,Element 2,…]])

Format 3: Array object name=[Element 1[,Element 2,…]]

The array length is variable, and the array element types can be different

For example: fruit=new Array(3);//fruit=new Array();

fruit[0]=”apple”;

fruit[1]="Yali";

fruit[2]=”orange”;

             fruit=new Array("Apple", "Yali", "Orange");

fruit=["apple","ya pear","orange"];//The most used

Three and two-dimensional arrays