MyPC-Cabinet: a/l it

Showing posts with label a/l it. Show all posts

Wednesday, February 4, 2015

Use of colors in HTML

we can use RGB colors in web pages to make the page more colorful.
Syntax of RGB color code is rgb(rr,gg,bb)

As an example to show green color using RGB code we can write as following, rgb(0,255,0)

You can get RGB code of a color by using “Adobe Photoshop” or any image processing software. But in HTML we us corresponding hexadecimal value of a RGB color code.
Example : for red color

RGB value = (255,0,0)
Hex value = #ff0000

But most web browsers support 17 main colors.
They are

Aqua
Black
Blue
Fuchsia
Gray
Green
Lime
Maroon
Navy
Olive
Orange
Purple
Red
Sliver
Teal
White
Yellow

we can use them without hex value.
We can use following HTML code
<HTML>
<HEAD>
<TITLE>Colors</TITLE>
</HEAD>
<BODY>
<H1>This is in red color</H1>
<H2>This is in green</H2>
This is some text
</BODY>
</HTML>

The output will be,

How to use background colors.

<HTML>
<HEAD>
<TITLE>Colors</TITLE>
</HEAD>
<BODY BGCOLOR=”orange”>
<H1>This is in red color</H1>
<H2>This is in green</H2>
This is some text
</BODY>
</HTML>

output,

Fonts in HTML

Use of different font styles

We can change font style using “font” tag
General syntax of a font tag

We can use many font types by using commas.
Example:
 This is Some text
Here if first font is not available then browser show the text using second font.

How to change font size
General Syntax : 
Can change according to 2 methods.
1.use of numbers
We can use numbers from 1 to 7
1 for smallest 7 for largest and 3 for normal size
Then 1 and 2 are smallest size,3 is normal size and 4 to 7 are large size.
2.Use of relative values
Use +1 to +6 for increasing values and -1 to -6 for decreasing values

Example,
This is font size 2
This is font size 7 (larger)
This is relative font size +3

Complete code,
<HTML>
<HEAD>
<TITLE>Fonts</TITLE>
</HEAD>
<BODY >
 This is Some text 
 This is Some text 
This is font size 2 
This is font size 7 (larger) 
This is relative font size +3 
This is relative font size -1
</BODY>
</HTML>

Output,

Friday, December 5, 2014

We can align headings to center, left or right. To align ,
<H1 align=”Center”>First heading</H1>

This will align the text “First heading” to center screen of your web browser.

How to use text formatting in HTML

Formatting a text

For text formatting there are some special tags.

For bold a text

We can use -- or --

Here stands for “bold”
For italic a text

We can use -- or -- or <DFN>--</DFN>
Here Stands for “italic”, stands for “emphasis” and <DFN> stands for “definition”

For superscript a text
We Can use -- for super scripting.
 stands for “superscript”

For subscript a text

We Can use -- for sub scripting.
 stands for “subscript”

For delete a text

We Can use <DEL>--</DEL> for delete a text with a single strike.
<DEL> stands for “delete”

For block quote a text

We Can use <BLOCKQUOTE>--</BLOCKQUOTE> for indent a text from left margin to right.

For highlight a text

We Can use -- for highlight a text.

For underline a text

We Can use -- for underline a text.
 stands for “underline”

To use addresses

We Can use <ADDRESS>--</ADDRESS>

Example:

<HTML>

<HEAD><TITLE>Text Formatting</TITLE></HEAD>

<BODY>

This is bold tag

This is italic tag

This tag is also use to italic a text

<DFN>Definition tag normally in italic </DFN>

I'm the 1st

Water is known as H2o.

This is my <DEL>first</DEL> HTML document

<BLOCKQUOTE>This text is away from left margin</BLOCKQUOTE>

I want to highlight this sentence

IS this underlined.

contact us @<ADDRESS>Main Road,Red light district.</ADDRESS>

</BODY>

</HTML>

Save this as “text formatting.html”.

Open it through your web browser.

Tuesday, November 18, 2014

Indentation

Indentation in Python

By default python uses 4 spaces per indentation level

Example:>>>def A1( ):

____x=10

____for i in range(1,10,1)

________print i

Spacing and maximum length of a line is 79.

Do not mix Tabs and spaces.

Python Identifires

Python Identifiers

Python identifier is a name used to identify a variable,function,class,module or other objects.

There are some rules/conventions about naming identifiers.

An identifier can start with the letter “A-Z” or “a-z”.
An identifier can start with the “_”followed by any digit or letter.
An identifier can start with the any letter followed by any digit.
An identifier can’t start with a digit
An identifier can’t use functional characters such as @,%,!

Note: Python is case sensitive language. So “name” and “Name” are 2 different identifiers.

Some conventions about naming identifiers.

Class names start with uppercase letters and all other identifiers with a lowercase letter Ex: Student stu1=new Student( ) Shape s1=new Shape( )
Starting an identifier with single leading underscore indicate by convention that the identifier is need to be private Ex: _accountno
Starting an identifier with 2 leading underscores indicate a strongly private identifire Ex:_ _password _ _pinnumber

Monday, November 17, 2014

Key Words in Python

Key words are the reserved words that use for specific command.

You can see those key words below.

and	del	form	not	with
as	elif	global	or	while
assert	else	if	pass	yield
break	except	import	print
class	exec	in	return
continue	finally	is	raise
def	for	lambda	try

As python is case sensitive language you should type those keywords in simple letters.

If you are using default settings in python GUI these key words are orange colored or purple colored.

Sunday, November 16, 2014

Introduction & Arithmetic Functions

Introduction to Python

Here we use version 2.7.6.

Let’s take a look at python GUI.

Use of arithmetic and logical expressions.

Order of mathematical operations.

Parentheses : ( )
Power : **
Multiplication,Division : * , /
Addition , Substraction : + , -
XOR : ^

Let’s work with some arithmetic problems.
(you can type an expression in python gui then press enter for the result)

1).2+5 2).5/2 3).9/3 4).9.0/3 5).9.0/3.0 6).2**3+8

---------------------------------------------------------------------------------------------------------------

we can use mode function using “%” symbol.

7).5%3 ;(Gives remainder)

N.B. Check out above highlighted ones. They gives different answers.
# is used to indicate comments in python.
You do not need to type those comments.

How to calculate complex arithmetic.

example 1 : 20/7*2.0**/1.5

Steps:

First name the symbols according to their simplification order.
(Refer the order mentioned above)

20/7*2.0**3/1.5

(3) (3) (2) (3)

If you have same order number in many locations number them from left to right.

20/7*2.0**3/1.5

(3) (3) (2) (3)

(1) (2) (3)
Then simplify according to step 1 or if you have to do step to do the calculation from left to right

20/7*2.0**3/1.5

(3) (3) (2)   (3) highlighted one first

(1) (2) (3)

20/7*8.0/1.5

(3)    (3) (3) highlighted one first

  (1)     (2) (3)

2*8.0/1.5

  (3) (3) highlighted one first

   (2)     (3)

16.0/1.5

  (3) highlighted one first

   (3)

10.666666666666666 This is the answer

First try these problems with your mind. Then check out in python gui .

45/6*5-6
5*4*(3+4)+6%4
7.0*5+2**4*(8/5+5*(9%4)-3