Q. Write a program in Java to input a number in decimal number system and convert it into
its equivalent number in the Hexadecimal number system.Hexadecimal Number system is a number
system which can represent a number in any other number system in terms of digits ranging from
0 to 9 and then A-F only.This number system consists of only sixteen basic digits i.e. 0,1,
2,3,4,5,6,7,8,9,A,B,C,D,E and F.Here 10 is represented as A,11 as B and so on till 15 which...