how to initialize an array in javascript

1var arrayName = new Array();
2var arrayName = new Array(Number length);
3var arrayName = new Array(element1, element2, element3);

1var events = [
2  {
3    userId: 1,
4    place: "Wormholes Allow Information to Escape Black Holes",
5    name: "Check out this recent discovery about workholes",
6    date: "2020-06-26T17:58:57.776Z",
7    id: 1
8  },
9  {
10    userId: 1,
11    place: "Wormholes Allow Information to Escape Black Holes",
12    name: "Check out this recent discovery about workholes",
13    date: "2020-06-26T17:58:57.776Z",
14    id: 2
15  },
16  {
17    userId: 1,
18    place: "Wormholes Allow Information to Escape Black Holes",
19    name: "Check out this recent discovery about workholes",
20    date: "2020-06-26T17:58:57.776Z",
21    id: 3
22  }
23];
24console.log(events[0].place);

1var array_name = [item1, item2, ...];