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Java Program to Convert Decimal to Binary using Loop

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In this tutorial, we will write a java program to convert decimal to binary without using array. Before that, you must have knowledge of the following topics in java.

Binary number

The binary numbers are based on 0 and 1, so it is a base 2 number. They are the combination of 0 and 1. For example, 1001, 110101, etc.

Decimal Number

These are the numbers with a base of 10, which ranges from 0 to 9. These numbers are formed by the combination of 0 to 9 digits such as 24, 345, etc.

Here is the chart where for the equivalent value of decimal and binary numbers.

Decimal to binary

Example:

Input: 5
Output: 101

Input: 7
Output: 111

Now let us go through a program for the conversion of decimal to binary in java using a while loop.

Java Program to convert Decimal to Binary using while loop

import java.util.Scanner;

public class Main
{
  public static void main(String[] args)
  {
    int i = 1, decimal, binary = 0, rem;
    Scanner sc = new Scanner(System.in);

    System.out.println("Enter a decimal number: ");
    decimal = sc.nextInt();

    while (decimal != 0)
    {
      rem = decimal % 2;
      binary += i * rem;
      decimal /= 2;

      i *= 10;
    }

    System.out.println("Equivalent Binary Value: " + binary);
  }
}

Output:

Enter a decimal number:
10
Equivalent Binary Value: 1010

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