Program to convert octal to binary

Problem statement:- Program to convert octal to binary using a while loop.

Data requirement:-

   Input Data:- octal

  Output Data:-binary

Program in C

Here is the source code of the C Program to convert octal to binary using a while loop.

Code:

#include <stdio.h>

#include <math.h>

int

main ()

{

  int octal;

  printf ("Enter octal number: ");

  scanf ("%d", &octal);

  int decimal = 0, i = 0;

  int binary = 0;

  while (octal != 0)

    {

      decimal = decimal + (octal % 10) * pow (8, i);

      i++;

      octal = octal / 10;

    }

  i = 1;

  while (decimal != 0)

    {

      binary = binary + (decimal % 2) * i;

      decimal = decimal / 2;

      i = i * 10;

    }

  printf ("Binary number is: %d", binary);

  return 0;

}

Input/Output:

Enter octal number: 105

Binary number is: 1000101

Program in C++

Here is the source code of the C++ Program to convert octal to binary using a while loop.

Code:

#include <iostream>

#include <cmath>

using namespace std;

int

main ()

{

  int octal;

  cout<<"Enter octal number: ";

  cin>>octal;

  int decimal = 0, i = 0;

  int binary = 0;

  while (octal != 0)

    {

      decimal = decimal + (octal % 10) * pow (8, i);

      i++;

      octal = octal / 10;

    }

  i = 1;

  while (decimal != 0)

    {

      binary = binary + (decimal % 2) * i;

      decimal = decimal / 2;

      i = i * 10;

    }

  cout<<"Binary number is: "<<binary;

  return 0;

}

Input/Output:

Enter octal number: 445

Binary number is: 100100101

Program in Java

Here is the source code of the C Program to convert octal to binary using a while loop.

Code:

import java.util.Scanner;

public class OctalToBinary {

public static void main(String[] args) {

    Scanner cs=new Scanner(System.in);

    int octal;

    System.out.println("Enter octal number: ");

    octal=cs.nextInt();

    int decimal = 0, i = 0;

    int binary = 0;

    while (octal != 0)

      {

        decimal = (int) (decimal + (octal % 10) * Math.pow (8, i));

        i++;

        octal = octal / 10;

      }

    i = 1;

    while (decimal != 0)

      {

        binary = binary + (decimal % 2) * i;

        decimal = decimal / 2;

        i = i * 10;

      }

    System.out.println("Binary number is: "+ binary);

    cs.close();

}

}

Input/Output:

Enter octal number: 445

Binary number is: 100100101

Program in Python

Here is the source code of the C Program to convert octal to binary using a while loop.

Code:

print("Enter octal number: ")

octal=int(input())
decimal = 0
i = 0
binary = 0
while (octal != 0):
      decimal = decimal + (octal % 10) * pow (8, i)
      i+=1
      octal = octal // 10
i = 1
while (decimal != 0):
      binary = binary + (decimal % 2) * i
      decimal = decimal // 2
      i = i * 10
print ("Binary number is: ", binary)

Input/Output:

Enter octal number: 

787

Binary number is:  1000000111

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