Number System.....=) ~Decimal,,,Binary,,,Octal,,,& Hexadecimal.........

Decimal Number System consists 10 numerals...:
=The values are 0,1,2,3,4,5,6,7,8,& 9....
=It's also known as Base-10....


Binary Number System only consists 2 numerals/digits...
=it's just 0 & 1....
=This number system also known as BITS @ Base-2....
=This number system constantly used by computer....

=0 & 1 also have their own meaning & easy to represent  the values that usually used in       electrical e.g voltages..currents
...0~no  signal
...1~signal


Octal Number System
=This number system represents 8 of numeral....=
=it's 0,1,2,3,4,5,6,7....
=This number system popular with named Based-8....


Hexadecimal Number System
=This number system uses 16 symbol....
=it's combined number & letter....
=They are 0,1,2,3,4,5,6,7,8,9  &  A,B,C,D,E,F....
=This number known as Base-16