Welcome to Computer Fundamental Notes, this portion is focus on Introduction to ASCII and Unicode. under the computer fundamental. In this section we will discuss about ASCII and Unicode, its uses etc.
What is ASCII?
ASCII Stand for American Standard Code for Information Interchange. ASCII is most common character encoding format for data in computer and internet. In its standard encoded data there are unique value for 128 alphabetic, numeric or special additional characters and control codes.
Character in ASCII include Lowercase and Uppercase A-Z, numerical 0-9 and others special symbol are included.
ASCII character representation in following ways.
- Based 16 numbers for Hexadecimal represent as 0 to 9 and A to F for decimal value 10 to 15.
- as three digit octal (base 8) number
- as decimal number from 0 to 127 and
- 7 bits or 8 bits binary
Example: ASCII encoding for lowercase letter “m” in representing in the following ways.
| Character | Hexadecimal | Octal | Decimal | Binary 7 bits | Binary 8 bits |
| m | 0x6D | 155 | 109 | 110 1101 | 0110 1101 |
