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Wednesday, 12 February 2020

ASCII Coding System And How ASCII Coding Works

ASCII Coding System

The scientists had to come up with a way for binary to be able to represent characters
ASCII (American Standard Code for Information Interchange) was developed

With ASCII every single character is assigned a binary code

ASCII  also allows computers to communicate with each other (files containing text can be copied from one computer to another)
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How ASCII Coding Works
 The first ASCII system used a series of 7 Bits

This meant that 27=128 different characters could be used

These 128 characters are represented in the following table

Now a Day’s
After some time it was noted that ASCII consisted only of the English alphabet, so an extra bit was added to accommodate more languages, graphics and mathematical symbols.

By adding an extra bit 128 more characters can be stored since 28=256.

Try it!
You can check the symbols on your computer by typing in its decimal code
1. Open Notepad (Start > Programs > Accessories > Notepad)
2.Make sure that NUM LOCK is switched on
3.Press and hold ALT
4.From the Numpad enter the 3 digits that you want (example 234 for Ω)
5. Release the ALT, and the symbol should appear.

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