how to understand for loops in javascript

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Few days back in summer we went to beach, I have collected few pebbles. I called my daughter given pebbles one by one.

how to understand if and else

Authour:I will teach you courses online

C Language	C++	Asp.net	VB.net	Oracle	Hardware and Networking	MCSE
Contact:	Name: Shrinivas	Mobileno:919703619391	E-mail: vas.shrinivas002@gmail.com

How to understand IF and Else:

Programming means a programmer expect some scenarios, in user perspective.

Based on that we develop program-mes. Don't think it's very hard.

See below explanation-A simple way to explain if and else

Today you decided to go your hometown, Assume that sometimes it will happen. While riding bike you have decided IF i luckily catch the train it's ok ELSE it's better to go by BUS. You rushed to railways station, you were all ready late. Then already option chosen by you that is BUS.

So real world you are a big programmer, I am right.

See this

if (train==their)

{

alert("Travel by train")

}

else

{

alert("Travel By BUS");

}

Niece explanation isn’t it. Again don't add my in your fans list.

If(i==5)

{

alert(“Target reached”);

}

Else

{

  Alert(“Try again”);

}

Very Simple.

Take my knowledge and improve yourself.

if and else

if(a==1)

{

alert("Yes a 1");

a=0;

}

else
{

alert("Some other value: " + a);

}

By reading above explanation you can easily understand this.

Next how to understand multiple if and else 

.
.

Thanks to Readers

Authour:I will teach you courses online

C Language	C++	Asp.net	VB.net	Oracle	Hardware and Networking	MCSE
Contact:	Name: Shrinivas	Mobileno:919703619391	E-mail: vas.shrinivas002@gmail.com

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Introducing Objects

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C Language	C++	Asp.net	VB.net	Oracle	Hardware and Networking	MCSE
Contact:	Name: Shrinivas	Mobileno:919703619391	E-mail: vas.shrinivas002@gmail.com

Objects r two types

DOM objects and Built-in objects, We have all ready see about Date dom objects in previous chapters, If not click on below link.

Although JavaScript’s variables and arrays are most convenient to store data. Sometimes you need big database. Like business card database, because every business card contains names, phone numbers, Addresses.

With objects, you can make the variables that store the db [database] as logical as business cards. Each person identified by a Card object which has properties for name, address and phone number.

How to Define an object:

You know that each object has certain methods and properties.

First we need to create object and then properties.

Object name is :Card

and properties are 

>>NAME

>>ADDRESS

>>MOBILE PHONE

>>HOUSE PHONE

To genrate number of objects in javascript is to create a function to make new card objects. This function is called constructor in javascript 

   

function Card(name,address,work,home){

this.name=name;

this.address=address;

this.workphone=work;

this.homephone=home;

}

Next print output like this.Let's create a function

function PrintCard()  {

line1="Name: " + this.name + "<BR>";
line2="Address:" + this.address + "<BR>";
line3="Workphone:" + this.workphone + "<BR>";
line4="Homephone:" + this.homephone +"<BR>";
document.write(line1,line2,line3,line4);
}

Above function will read the properties from current object by THIS and assign to
line1,line2,line3,line4

output with document.write(line1,line2,line3,line4)

Creating an Object Instance:

shrinivas=new Card("Vas shrinivas","new Avenue street","80987000000000","090000000" );

Now Card function is called, Assigned these parameters in to variables of Card function. And you created shrinivas object.

You did everything at a time, Above code you can write like this

1).Line-------------------------->shrinivas=new Card();
2).Line--------------------------->shrinivas.

Now if you write shrinivas. After you put (DOT after shrinivas) you will see all properties of Card function, they are name, address, work, home.

shrinivas=new Card();
shrinivas.name="Vas.Shrinivas";
shrinivas.address="new Avenue street";
shrinivas.work="80987000000000";
shrinivas.home="090000000";

Now this time to print everything

shrinivas.PrintCard();

Extending Built-in Objects

It's like extend power of objects, Means adding new features to it.

How?

For example, if u thinks the String object doesn't fit for our needs, we can extend it. 

title="Shrinivas welcomes you";

document.write(title.heading(1));

Example:
<html>
<head><title>Test of headings </title>
</head>

<body>

<script type="text/javascript">

function addhead (level) {

html="H" + level;

text=this.toString();

start="<" + html + ">";

stop="</" + html + ">";

return start + text + stop;

}

String.prototype.heading=addhead;

document.write("This is a heading 1" .heading(1));
document.write("This is a heading 2" .heading(2));
document.write("This is a heading 3" .heading(3));

</script>
</body>

</html>