the hexa decimal number system is one with a base of 16.
the base of 16 suggests choices of 16 single-character digits or symbols.
the first 10 digits
are the digits of a decimal system is 0 to 9. and other is A to F.
again each position in a hexadecimal system represent a power of the bse(16).
thus the decimal equivalent of the hexa decimal number 1AF
written as simmilar as (1AF)H.
