RGB (Red, Green, Blue)

Css Color

Colors in CSS are most often specified by:

• a valid color name - like "red"
• an RGB value - like "rgb(255, 0, 0)"
• a HEX value - like "#ff0000"

Note: Color names are case-insensitive: "Red" is the same as "red" or "RED".

RGB (Red, Green, Blue)

RGB color values can be specified using this formula: rgb(red, green, blue).

Each parameter (red, green, blue) defines the intensity of the color between 0 and 255.

For example, rgb(255,0,0) is displayed as red, because red is set to its highest value (255) and the others are set to 0. Experiment by mixing the RGB values

Hexadecimal Colors

RGB values can also be specified using hexadecimal color values in the form: #RRGGBB, where RR (red), GG (green) and BB (blue) are hexadecimal values between 00 and FF

(same as decimal 0-255).

For example, #FF0000 is displayed as red, because red is set to its highest value (FF) and the others are set to the lowest value (00). 

Note: HEX values are case-insensitive: "#ff0000" is the same as "FF0000".
this is very important for css because color are use in css many times.
therefore read this chapter two three time for making color schemes ................

COMPUTER PROGRAMMING LANGUAGE

COMPUTER PROGRAMMING LANGUAGE

A programming language is a formal computer language designed to communicate instructions to a machine, particularly a computer. Programming languages can be used to create programs to control the behavior of a machine or to express algorithms.

The earliest known programmable machine preceded the invention of the digital computer and is the automatic flute player described in the 9th century by the brothers Musa in Baghdad, "during the Islamic Golden Age". From the early 1800s, "programs" were used to direct the behavior of machines such as Jacquard looms and player pianos. Thousands of different programming languages have been created, mainly in the computer field, and many more still are being created every year. Many programming languages require computation to be specified in an imperative form (i.e., as a sequence of operations to perform), while other languages use other forms of program specification such as the declarative form (i.e. the desired result is specified, not how to achieve it).The description of a programming language is usually split into the two components of syntax (form) and semantics (meaning). Some languages are defined by a specification document (for example, the C programming language is specified by an ISO Standard), while other languages (such as Perl) have a dominant implementation that is treated as a reference. Some languages have both, with the basic language defined by a standard and extensions taken from the dominant implementation being common.

• Java. Java is considered as the perfect language for the developers and programmers to learn. ...
• PHP. ...
• JavaScript. ...
• Python. ...
• Objective-C. ...
• Ruby. ...
• Perl. ...
• C, C++ and C#

COMPUTER SOFTWARE

COMPUTER SOFTWARE

Computer software, or simply software, is that part of a computer system that consists of encoded information or computer instructions, in contrast to the physical hardware from which the system is built.

The term "software" was first proposed by Alan Turing and used in this sense by John W. Tukey in 1957. In computer science and software engineering, computer software is all information processed by computer systems, programs and data.

Computer software includes computer programs, libraries and related non-executable data, such as online documentation or digital media. Computer hardware and software require each other and

neither can be realistically used on its own.

At the lowest level, executable code consists of machine language instructions specific to an individual processor—typically a central processing unit (CPU). A machine language consists of groups of binary values signifying processor instructions that change the state of the computer from its preceding state. For example, an instruction may change the value stored in a particular storage location in the computer—an effect that is not directly observable to the user. An instruction may also (indirectly) cause something to appear on a display of the computer system—a state change which should be visible to the user. The processor carries out the instructions in the order they are provided, unless it is instructed to "jump" to a different instruction, or is interrupted.

The majority of software is written in high-level programming languages that are easier and more efficient for programmers, meaning closer to a natural language. High-level languages are translated into machine language using a compiler or an interpreter or a combination of the two. Software may also be written in a low-level assembly language, essentially, a vaguely mnemonic representation of a machine language using a natural language alphabet, which is translated into machine language using an assembler.

Advantages and Disadvantages of internet

Advantages and Disadvantages of internet

Advantages and disadvantages of computer

VIDEO

Disadvantages of internet

Disadvantages of internet

1. There is a lot of wrong information on the internet. Anyone can post anything, and much of it is garbage. 
2.  There are predators that hang out on the internet waiting to get unsuspecting people in dangerous situations. 
3.  Some people are getting addicted to the internet and thus causing problems with their interactions of friends and loved ones. 
4.  Pornography that can get in the hands of young children too easily. 
5.  Easy to waste a lot of time on the internet. You can start surfing, and then realize far more time has passed than you realized. Internet and television together of added to the more sedentary lifestyles of people which further exacerbates the obesity problem. 
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7.  Internet has a lot of "cheater" sites. People can buy essays and pass them off as their own far more easily than they used to be able to do. 
8.  There are a lot of unscrupulous businesses that have sprung up on the internet to take advantage of people. 
9.  Hackers can create viruses that can get into your personal computer and ruin valuable data. 
10.  Hackers can use the internet for identity theft. 
11.  It can be quite depressing to be on the internet and realize just how uneducated so many people have become in today's society.

disadvantages of computer

disadvantages of computer

Computers make it extremely easy to store and access data, but their increasing use has led to an extreme level of dependence on them, which can create a number of problems if and when computers malfunction. A power outage can render entire businesses or institutions essentially inoperable without the use of computers. Data that is stored on computers can also be lost permanently if not backed up properly, and back up methods are not entirely dependable.

In a similar vein, personal data stored on computers is often extremely vulnerable to digital theft. Data regarding bank accounts, credit cards, social security numbers and more is commonly transmitted online, and security protocols to protect this data are not always effective.

Computers also create the added potential for distraction. The sheer amount of content on the Internet makes it possible to spend almost limitless time browsing blogs, playing games or chatting with friends. This can dramatically detract from productivity, whether it's at work, in school or at home. Computers can also hinder social interactions. Many users are often distracted from real life interactions by the draw of computers, diminishing social relationships.

advantages of computer

Advantages of computer

Computer has made a very vital impact on society. It has changed the way of life. The use of computer technology has affected every field of life. People are using computers to perform different tasks quickly and easily. The use of computers makes different task easier. It also saves time and effort and reduces the overall cost to complete a particular task.
Many organizations are using computers for keeping the records of their customers. Banks are using computers for maintaining accounts and managing financial transactions. The banks are also providing the facility of online banking. The customers can check their account balance from using the internet. They can also make financial transaction online. The transactions are handled easily and quickly with computerized systems.
People are using computers for paying their bills, managing their home budgets or simply having some break and watching a movie, listening to songs or playing computer games. Online services like skype or social media websites are used for communication and information sharing purposes.