4. Octal and Hexadecimal number system
Post date: 01-Jul-2014 04:50:04
Octal Number System
- Octal number system uses eight digits running from 0-7 to represents values of a number. the place value go up in a factor of 8
The table below clearly shows how octal numbers grow with a factor of 8 from left to right
Hexadecimal Number System
- This number system has a radix of 16. It uses sixteen digits ranging from 0-9 and letters A-F where A is equivalent to 10, up to F which is equivalent to 16.
- The place value of hexadecimal numbers goes up in factors of sixteen as shown in the table below:
The table below clearly shows how hexadecimal numbers grow with a factor of 16 from left to right
Reasons for using octal and hexadecimal number systems
- A single octal or hexadecimal digit encodes more than one binary digit. This is automatic data compression, hence storage mediums can save on space
- Instead of transmitting long digits of '0's and '1's between devices, the data can be encoded as octal or hexadecimal to improve transmission efficiency.
Numeral systems conversion table
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