ASCII character Set: The ASCII is stands for “ A merican S tandard C ode for I nformation I nterchange”. It uses 128 unique characters which represent the English letters, punctuation marks and other characters. It uses seven bits to represent each character in the set. Check bit is used as the eighth bit to ensure proper data transmission. Extended ASCII character version includes the eighth bit and allows 256 unique characters, which includes some additional symbols and some accented letters. ASCII has a finite number of characters; so it lists them all and assigns binary string value to each one of them. ASCII character set as well as Unicode character set treats uppercase and lowercase letters distinctly. For example, the ASCII code for A is 65. When “A” is typed on keyboard, its equivalent ASCII value “65" will be automatically stored in the memory.

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Chapter 1, Problem 3E

Program Plan Intro

ASCII character Set:

The ASCII is stands for “American Standard Code for Information Interchange”.

It uses 128 unique characters which represent the English letters, punctuation marks and other characters.

It uses seven bits to represent each character in the set. Check bit is used as the eighth bit to ensure proper data transmission.

Extended ASCII character version includes the eighth bit and allows 256 unique characters, which includes some additional symbols and some accented letters.

ASCII has a finite number of characters; so it lists them all and assigns binary string value to each one of them.

ASCII character set as well as Unicode character set treats uppercase and lowercase letters distinctly.

For example, the ASCII code for A is 65. When “A” is typed on keyboard, its equivalent ASCII value “65" will be automatically stored in the memory.

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