Number System
Computer Number Systems
Decimal Number System
The decimal number system consists of 10 digits 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9 and is the most commonly used number system. We use the combination of these 10 digits to form all other numbers. The value of a digit in a number depends upon its position in the number. The place value table for the decimal number system is as:
Binary Number System
In the binary number system, we only use two digits 0 and 1. It means a 2 number system.
Example of binary numbers: 1011; 101010; 1101101
Hexadecimal Number System
The word hexadecimal comes from Hexa meaning 6, and decimal meaning 10. So, in a hexadecimal number system, there are 16 digits. It consists of digits 0 to 9 and then has first 5 letters of the alphabet as:
Octal Number System
Characteristics of the octal number system are as follows −
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Uses eight digits, 0,1,2,3,4,5,6,7
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Also called as base 8 number system
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Each position in an octal number represents a 0 power of the base (8). Example 80
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Last position in an octal number represents a x power of the base (8). Example 8x where x represents the last position - 1