Digital techniques__Number system

So, basically number systems are used in positional system of representing numbers, the numbers are important  because it represents base. 

The decimal number system has radix 10 and we used decimal number system in daily life while dealing with money.likewise binary number system has radix 2 and it is mostly used in computer technology. 

The octal has radix 8 and it is used as a shorthand for representing file permission on UNIX system and representation of UTF8 numbers. The hexadecimal number system has a radix 16 and it makes large binary numbers in just a few digits.