PROGRAMS FOR ISC PRACTICAL EXAM GUIDANCE

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 is
    represented as F.For example :47 in hexadecimal number system can be represented as 2F in the
    Hexadecimal number system.

 import java.io.*;
public class DecimalToHexa
 {
     public static void main(String args[])throws Exception
     {
         InputStreamReader isr =new InputStreamReader(System.in);
         BufferedReader stdin=new BufferedReader(isr);
         System.out.print("Enter the number in decimal number system:");
         int n=Integer.parseInt(stdin.readLine());
         int r;
         String s="";  //variable to store the result after
                       //sorting the digits as in hexadecimal number system
         char dig[]={'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
         while(n>0)
          {
              r=n%16;  //finding the remainder
              s=dig[r]+s; //adding the remainder to the result
              n=n/16;
          }
          System.out.print("Output="+s);
      }
 }

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