Code

Code
• Code reduces the volume of data, so data manipulation becomes easier and less error involved with data.
• Types of code:
• (1)BCD Code: It is used to represent numbers in computer system. It is 4 bit code. It is a weighted code and 8-4-2-1 weight is given to every number. Example: The BCD of 13 is: 00010011
25 = 00100101
• (2)Alphanumeric Code: It is a 8 bit code.It is used to represent alphabets, digits, symbols, special symbols tic etc. 4 bit of this code is zone bits and 4 bit is 8-4-2-1 ,Ex: ASCll,EBCDIC
Z Z Z Z 8 4 2 1
• (3)Uni code: It is a 16 bit code. It is used to represent special languages like Bengali, Hindi, Chinese, Arabic etc.