Array in Javascript

One of the most important object in javascript is Array object.

The Array in javascript is used to store the multiple value in a single variable.

Syntax:

var arrayVariableName=[item1, item2, item3];

or

var arrayVariableName=new Array(item1, item2,...);

Examples:

1. Assign values in array

var arr=[1,2,3,'a','b',1.5];

2. Add element in array
var arr=[1,2,3,'a','b',1.5];
arr.push("xyz");
console.log(arr);

//Result will be
[1,2,3,'a','b',1.5,'xyz'];

3. Remove Element from array:

var arr=[1,2,3,'a','b',1.5];

i) Remove last item:
arr.pop();

ii) remove the more then one item by:

arr.splice(0,1);// it takes two parameter fromIndex and No of element to remove

Result:
It will change the original array like below:
[2, 3, "a", "b", 1.5]

and return a new array also (list of the element removed) like below:
[1]

It also takes one more parameter to insert items form where item are being removed. 

arr.splice(0,1,'aaa','bbb')

Result:
it will return [1]

and

will modify the original array like below:
["aaa", "bbb", 2, 3, "a", "b", 1.5]