Tuesday 29 September 2015

Class 7 - Ch 7

Formatting tags

The formatting tags are used to give a stylish appearance to the text in the web page.

Bold

The text appears darker.

.....

Italics

The text appears different(slanting).

....

Underline

There is a line below the text.

.....

Strikethrough

A line is drawn across the text.

Superscript

Text appears above the text.

....

Subscript

Text appears below the text

.....

Center

Text appears in the middle of the screen.

<html>
<head>
<title>
Friends
</title>
</head>
<body bgcolor=olive text =white>
<center><h1>FRIENDS</h1></center>

Written with a pen, sealed with a kiss, 
If you are my friend , please answer me this: 
Are we friends, or are we not? 
You told me once, but I forgot. 
So tell me now, and tell me true, 
So I can say I'm here for you.
Of all the friends I've ever met, 
You're the one I won't forget. 
And if I die before you do, 
I'll go to Heaven and wait for you, 
I'll give the <h2>angels</h2> back their wings 
And risk the loss of everything. 
There isn't a thing I wouldn't do, 
To have a friend just like you!

The true author is unknown

</body>
</html>

OUTPUT

Monday 28 September 2015

Input Method:

We are going to use Scanner for accepting values from the user . Its a simple one.

First include the package util.

import java.util.*;

Only small letters and * indicates all the files from the package and there is a semi colon in the end.

Then comes the main function

public static void main( )
{
Scanner S=new Scanner(System.in);

Remember S in red colour are capital letters. Here S is a variable can be in small or capital letter or any other variable name.

There are different statements for accepting different data type values.

int a= S.nextInt( );

float f= S.nextFloat( );

double x=S.nextDouble( );

But accepting character and string are different.

char ch=(char)System.in.read( );

String st=S.next( );

String st1=S.nextLine( );

next( ) accepts a word till a space and keeps the cursor in the same line.

nextLine( ) accepts words and moves the cursor to the next line after accepting the value.

Let us accept two numbers.

import java.util.*; ------------------------------------ 1

class ex1
{
public static void main( )
{
Scanner s=new Scanner(System.in); --------------- 2
int a, b,sum; --------------------------------------------- 3
System.out.println("Enter the first number"); ------ 4
a=s.nextInt( ); ------------------------------------------- 5
System.out.println("Enter the second number");----- 4
b=s.nextInt( );-------------------------------------------- 5
sum=a+b; -------------------------------------------------6
System.out.print("Total = " +sum);------------------- 7
}
}

1 is the first line in the program.

2 Write any variable instead of s , if you want.

3 is variable declaration.

4 is just a prompt message. A remainder to the user to enter a number.

5 Since I am accepting integer values, it should be nextInt. Remember no space after next and I in Int is capital.

6 is the calculation

7 is the output.

For other programs step 3 and step 5 will be different according to the data type you use.

Sunday 27 September 2015

Class 7 - Links

Class 7 -List

List

Lists are used when we want to display the information in points.

There are three types of lists.

Ordered List
Unordered List
Description List

Ordered List :

<ol > - Default list. It gives the numbers.
<ol type=A>
<ol type=a>
<ol type=I>
<ol type=i>

Output :

Unordered List

Disc - Default list
Circle
Square

Output :

Description List

Output :

Nested List

Output :

Friday 18 September 2015

Class 7 (list)

Wednesday 16 September 2015

Class 7 - Line

The above output has 5 lines. The first one is a thin line, because there is no size tag.

<html>
<head>
<title> Example 3</title>
</head>
<body>
<hr > 
<hr size=3 color=red> 
<hr size=8 color=green>
<hr size=3 align=right color=blue>
<hr size=3 noshade >
</body>
</html>
2.
<html>
<head>
<title> Example 4</title>
</head>
<body>

We the Cottonians 

We are all here 

We want to do YES 

Always our best 

Our motto is 

NEC DEXTRORSUM NEC SINSITRORSUM

Hip Hip Hurrah.......
</body>
</html>

Class 8 - Inputbox

There are 4 steps in a program.
1. Declaration (dim)
2. Assign / Input the value
3. Calculation(if any)
4.Output(Msgbox/Print)

Class 8 - Activity(Pg 86)

1. Declare the integer variables x,y and z

Dim x,y,z as Integer

2. Assign values 5 to x, 10 to y and 15 to z

x=5
y=10
z=15

3. What are the values of C, N1, N2, N3 :

A=5
B=10
C=A+B
N1=A+10
N2=B
N3=5+N2

C=15( since A is 5 and B is 10)
N1=15 ( A is 5 and add 10 to it)
N2=10(B is 10)
N3=15 (N2 is 10 and add 5 to it)

3. Declare a string variable Friend, a numeric variable Num1 to store a decimal value. Assign the value 'Vedika' to the string variable created above.

dim Friend as String

dim Num1 as double

Friend = Vedika

Class 8 - Declaring a variable

Declaring a variable is used to reserve space in memory. There are 2 types of variable declaration:

Implicit declaration
Explicit declaration

Implicit Declaration :

Whenever VB comes across a variable, it is assigned a default data type.

Explicit Declaration :

When the user wants to specify the data type of the variable, then it is called declaring explicitly.

Dim statement is used to declare a variable.

Syntax :

dim variable name as data type

Example :

dim a,b,c as Integer
dim m as single, i,j as Integer

String variable declaration :

String declaration is little different from other data type declaration.
There are two types of string declaration.

Variable Length
Fixed Length

If we want to enter a data of any length then it is variable length.

dim name as string

If we want to enter a data with a particular length, then it is called fixed length.

dim name as string * 3

In the above example we can enter a string with 3 characters only.

Assigning a value :

Once the variable is assigned a data type, the value should be given to it.
To declare and assign one variable :
dim a as integer
a=100

or
dim a as integer = 100

To declare more than one variable :

dim a,b,c as integer
a=10
b=20
c=30

Tuesday 15 September 2015

Class 8 - Date Function

Class 8 - Introduction

Visual Basic

Visual basic was derived from the language BASIC.

BASIC has its own limitations., it is a simple programming language but used only in a text based environment. But visual basic is

User friendly

Supports Graphical User Interface(GUI)VB

VB is an Event- driven programming, which means the flow of the program is determined by an Event.

An Event is an action performed either by mouse click, double click or pressing keys on the keyboard.

Integrated Development Environment describes the interface and the environment we use to create our own applications.

1. Form design window

2. Tool box

3. Menu bar

4. Project explorer

5. Properties window

6. Form layout

Project Explorer Window

It lists all the forms in the project. The components of the window are:

View code
View object
Toggle folders
Project name
Forms folder
form module

Properties Window

It displays the properties like font name, caption, background colour etc of the selected object on the form.

A form is saved with an extension .frm .
A project is saved with an extension .vbp .

To execute the visual basic program :

Click Run from Start option
Click start on the Toolbar
Press F5 key

Class 8 - Data Type in VB

A data type determines what type of values a variable can hold.
In numbers we have different types like 5(whole number), 6.9(decimal number).

The computer memory is made up of storage areas which will hold the values.

When we give a value to a variable, the computer will allocate space in the memory to hold the variable. The storage space will be different for different values, based on the type of value.

Data types :

Natural Numbers

byte
integer
long

Byte : Number ranges from 0 to 255.

Integer : Larger than byte. Ranges from -32,768 to 32,767

Long : It can hold more than integer. To store very large number.

Decimal Numbers

Single
Double

Single : To store decimal values. Less Precision.

Double : Large decimal numbers. Very precise values.

String :

It is also called alphanumeric (i.e) alphabets and numbers. It can be a word, group of words, numbers .

Boolean :

This value can be either true or false.

Variant :

It can represent any value.

Date :
It stores vales from 1/1/100 to 12/3/9999.

Tuesday 29 September 2015

Class 7 - Ch 7

</body>
</html>

Monday 28 September 2015

Class 8 - Program(sum)

Class 9 - Scanner

Sunday 27 September 2015

Class 7 - Links

Class 7 -List

List

Ordered List

Unordered List

Description List

Ordered List :

Friday 18 September 2015

Class 7 (list)

Wednesday 16 September 2015

Class 7 - Line

Class 7 - Heading Tag

Class 8 - Inputbox

Class 8 - Activity(Pg 86)

Class 8 - Declaring a variable

Tuesday 15 September 2015

Class 8 - Date Function

Class 8 - Introduction

Visual Basic

Visual basic was derived from the language BASIC.

BASIC has its own limitations., it is a simple programming language but used only in a text based environment. But visual basic is

User friendly

Supports Graphical User Interface(GUI)VB

VB is an Event- driven programming, which means the flow of the program is determined by an Event.

An Event is an action performed either by mouse click, double click or pressing keys on the keyboard.

Integrated Development Environment describes the interface and the environment we use to create our own applications.

Class 8 - Data Type in VB

Time

Go Gently...... Cottonians

Tuesday 29 September 2015

</body></html>

Monday 28 September 2015

Sunday 27 September 2015

List

Ordered List

Unordered List

Description List

Ordered List :

Friday 18 September 2015

Wednesday 16 September 2015

Tuesday 15 September 2015

Visual Basic

Visual basic was derived from the language BASIC.

BASIC has its own limitations., it is a simple programming language but used only in a text based environment. But visual basic is

User friendly

Supports Graphical User Interface(GUI)VB

VB is an Event- driven programming, which means the flow of the program is determined by an Event.

An Event is an action performed either by mouse click, double click or pressing keys on the keyboard.

Integrated Development Environment describes the interface and the environment we use to create our own applications.

</body>
</html>