Program to convert binary to octal using while loop

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

Data requirement:-

   Input Data:- binary

  Output Data:-octal

Program in C

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

Code:

#include<stdio.h>

#include<math.h>

int

main ()

{

  int binary;

  printf ("Enter a binary number: ");

  scanf ("%d", &binary);

  int octal = 0, decimal = 0, i = 0;

  while (binary != 0)

    {

      decimal = decimal + (binary % 10) * pow (2, i);

      i++;

      binary = binary / 10;

    }

  i = 1;

  while (decimal != 0)

    {

      octal = octal + (decimal % 8) * i;

      decimal = decimal / 8;

      i = i * 10;

    }

  printf ("octal value: %d",octal);

}

Input/Output:

Enter a binary number: 10001

octal value: 21

Program in C++

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

Code:

#include<iostream>

#include<cmath>

using namespace std;

int

main ()

{

  int binary;

  cout<<"Enter a binary number: ";

  cin>>binary;

  int octal = 0, decimal = 0, i = 0;

  while (binary != 0)

    {

      decimal = decimal + (binary % 10) * pow (2, i);

      i++;

      binary = binary / 10;

    }

  i = 1;

  while (decimal != 0)

    {

      octal = octal + (decimal % 8) * i;

      decimal = decimal / 8;

      i = i * 10;

    }

  cout<<"octal value: "<<octal;

}

Input/Output:

Enter a binary number: 1110101

octal value: 165

Program in Java

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

Code:

import java.util.Scanner;

public class BinaryToOctal {

public static void main(String[] args) {

    Scanner cs=new Scanner(System.in);

   System.out.println("Enter a binary number: ");

    int binary=cs.nextInt();

    int octal = 0, decimal = 0, i = 0;

    while (binary != 0)

      {

        decimal = (int) (decimal + (binary % 10) * Math.pow (2, i));

        i++;

        binary = binary / 10;

      }

    i = 1;

    while (decimal != 0)

      {

        octal = octal + (decimal % 8) * i;

        decimal = decimal / 8;

        i = i * 10;

      }

   System.out.println("octal value: "+octal);

    cs.close();

}

}

Input/Output:

Enter a binary number: 

00010111

octal value: 27

Program in Python

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

Code:

print("Enter a binary number: ")

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

Input/Output:

Enter a binary number: 

101

octal value:  5

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