• Hexadecimal number system is made up of 16 symbols. The base of this system is 16. It uses the 10 decimal numbers and extra six symbols. There are no symbols that means ten, or eleven etc. So these symbols are taken from English alphabet: A,B,C,D,E, and F.
  • Hexadecimal A=decimal 10, B=decimal 11 ,C=decimal 12, D=decimal 13, E=decimal 14, F=decimal 15.
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  • It is used as intermediary system in computers, such as representation of memory addresses.
  • it is used to define colors on web pages, such as each primary color-red, green, blue is characterized by two hexadecimal digits. The format being used is RRGGBB. RR stands for red, GG stands for green and BB stands for blue.
  • It provides us  with a shorthand method of working with binary numbers. Each  group of  four binary digits can be represented by a single hexadecimal digit. 
           For example,
  • Conversion of hexadecimal to decimal
                            3A16         =          3 x 16^1 + A x 16^0                                               
                              
                                          =          3 x 16 + 10 x 1
                                          =          48 + 10
                                          =          5810
  • Conversion of  hexadecimal to decimal
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  • Conversion of binary to hexadecimal