Objects:

1)An object is a collection of key value pairs.(or)
2)An object is a unordered list of datatypes that is stored as name-value pairs.
3)Booleans,Numbers,Strings can be objects.
4)Dates,Maths,Regular Expressions,Arrays,Functions also objects.
5)JS objects are mutable.
Syntax:
var obj = { };  (or)
var obj = new Object();

Assigning values:
obj.name=".com";
obj.name1=".net";
obj.name2=".gov";
(or)
var obj = {
     name=".com";
     name1=".net";
     name2=".gov";

}

Accessing Object value:
document.writeln("name1: "+obj.name1); (or)
document.writeln("name1: "+obj['name1']);

Deleting property:
The delete statement is used to delete property in object.
delete obj.name;

Task: Take computer as object and display all its properties
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Object Methods:
In JS, methods are actions performed on objects.
The JavaScript this keyword refers to the object it belongs to. This has different values depending on where it is used. In a method, this refers to the owner object.

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Date Object in JS:
JavaScript is use to set the current date/time in different different format (like milliSecond, minutes, hours etc).
Date Objects are created with new Date() constructor.

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Date Formats:
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Date Methods:
By using date methods, we can get and set values to Date Object.

Get Methods:
getDate():               Get the Date of the Month.
getDay():                Get the Day of the Week.
getFullYear():         Get the Full Year in four Digit.
getHours():            Get the Hours between 0 to 23.
getMilliseconds(): Get the Milliseconds between 0 to 999.
getMinutes():         Get the Minutes between 0 to 59.
getMonth():            Get the Month between 0 to 11.
getSeconds():        Get the Seconds between 0 to 59.
getTime():               Get the Milliseconds since Jan 1, 1970.

Set Methods:
setDate():               Set the Date of the Month.
setFullYear():         Set the Full Year in four Digit.
setHours():         Set the Hours between 0 to 23.
setMilliseconds(): Set the Milliseconds between 0 to 999.
setMinutes():        Set the Minutes between 0 to 59.
setMonth():            Set the Month between 0 to 11.
setSeconds():        Set the Seconds between 0 to 59.

setTime():         Set the Milliseconds since Jan 1, 1970.


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Math Object:

In JS, Math object is used to perform mathematical operations.
Methods:
abs(x): returns absolute value.
ceil(x): returns the value that is rounded to nearest integer.
exp(x): returns exponential value. 
floor(x): returns the value that is rounded down to nearest integer.               
round(x): returns the value that is rounded to nearest integer.                   
log(x): returns logarithmic value.                        
max(x1, x2, x3..x4): returns maximum value among 'n' numbers.              
min(x1, x2, x3..x4):  returns minimum value among 'n' numbers.                     
pow(x,y): returns x power y.
random(): returns number between 0 to 1.

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