1.6 MISC

Character representation – ascii code

The American Standard Code for Information Interchange or ASCII assigns values between 0 and 255 for upper and lower case letters, numeric digits, punctuation marks and other symbols. ASCII characters can be split into the following sections:

§  0 – 31                          Control codes

§  32 – 127                      Standard, implementation-independent characters

§  128 – 255                    Special symbols, international character sets – generally, non-

                                             standard characters.

0 – 9	48 - 57
A – Z	65 – 90
a - z	97 – 122

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BITS & BYTES

§  A bit is the basic unit of information.

§  A byte consists of eight bits grouped together.

§  Bit significance

The leftmost bit has the largest value and is called the most significant bit (MSB) whereas the rightmost bit has the least value and is therefore called the least significant bit (LSB).