Question

Write a program to input a number and display it into its Binary equivalent. 

Sample Input: (21)₁₀

Sample Output: (10101)₂ 

Answer 1

import java.util.*;
public class Q10
{
     public static void main(String args[]) {
         Scanner in = new Scanner(System.in);
         System.out.print(“Enter the decimal number: ");
         long decimal = in.nextLong();
         long binary = 0, m = 1, rem = 0;

         while(decimal > 0) {
           rem = decimal % 2;
           binary = binary + (rem * m);
           m *= 10;
           decimal /= 2;
         }
         System.out.printIn(“Equivalent binary number: " + binary);
     }
}