Python Program to Convert Binary to Octal using While Loop

In the previous article, we have discussed Python Program to Convert Octal to Decimal using While Loop
Given a binary number and the task is to get the respective octal number using the while loop.

Examples:

Example1:

Input:

Given Binary Number = 1010

Output:

The Octal value of the given binary number { 1010 } is: 
12

Example2:

Input:

Given Binary Number = 1101

Output:

The Octal value of the given binary number { 1101 } is: 
15

Program to Convert Binary to Octal using While Loop in Python

Below are the ways to convert the given binary number into octal :

Using While Loop (Static Input)
Using While loop (User Input)

Method #1: Using While Loop (Static Input)

Approach:

Give the binary number as static input and store it in a variable.
Take a variable say octl_num and initialize its value with 0.
Take another variable say deciml_num and initialize its value with 0.
Again take another variable say ‘a’ and initialize its value with 0.
Loop till the given binary number is not equal to zero using the while loop.
Inside the loop, calculate the given binary number modulus 10 (to get the last digit).
Store it in a variable ‘b‘.
Calculate the value of 2 raised to the power a using the pow() function and multiply it with the above-obtained value ‘b‘.
Store it in a variable ‘c‘.
Add ‘c‘ to the above-initialized deciml_num and store it in the same variable deciml_num.
Increment the value a by 1 and store it in the same variable ‘a’.
Divide the given binary number by 10 and store it in the same variable binry_numb.
Come out of the while loop and initialize the value of ‘a’ with 1.
Loop till the decimal number is not equal to zero using the while loop.
Multiply ‘a‘ with the deciml_num modulus 8 and store it in a variable ‘d’.
Add the value of ‘d’ with the above-initialized octl_num and store it in the same variable octl_num.
Divide the deciml_num by 8 and store it in the same variable deciml_num.
Multiply ‘a’ with 10 and store it in the same variable ‘a’.
Print the octl_num to get the octal value of the given binary number.
The Exit of the Program.

Below is the implementation:

# Give the binary number as static input and store it in a variable.
binry_numb = 1010
# Take a variable say octl_num and initialize its value with 0.
octl_num = 0
# Take another variable say deciml_num and initialize its value with 0.
deciml_num = 0
# Again take another variable say 'a' and initialize its value with 0.
a = 0
# Loop till the given binary number is not equal to zero using the while loop.
print("The Octal value of the given binary number {", binry_numb, "} is: ")
while (binry_numb != 0):
 # Inside the loop, calculate the given binary number modulus 10 (to get the last digit).
 # store it in a variable 'b'.
    b = (binry_numb % 10)
    # Calculate the value of 2 raised to the power a using the pow() function and multiply
# it with the above-obtained value 'b'.
 # Store it in a variable 'c'.
    c = pow(2, a)*b
 # Add 'c' to the above-initialized deciml_num and store it in the same variable deciml_num.
    deciml_num = deciml_num + c
    # Increment the value a by 1 and store it in the same variable 'a'.
    a += 1
 # Divide the given binary number by 10 and store it in the same variable binry_numb.
    binry_numb = binry_numb // 10
 # Come out of the while loop and initialize the value of 'a' with 1.
a = 1
# Loop till the decimal number is not equal to zero using the while loop.
while (deciml_num != 0):
    # Multiply 'a' with the deciml_num modulus 8 and store it in a variable 'd'.
    d = (deciml_num % 8) * a
 # Add the value of 'd' with the above-initialized octl_num and store it in the same
    # variable octl_num.
    octl_num = octl_num + d
    # Divide the deciml_num by 8 and store it in the same variable deciml_num.
    deciml_num = deciml_num // 8
    # Multiply 'a' with 10 and store it in the same variable 'a'.
    a = a * 10
# Print the octl_num to get the octal value of the given binary number.
print(octl_num)

Output:

The Octal value of the given binary number { 1010 } is: 
12

Method #2: Using While loop (User Input)

Approach:

Give the binary number as user input using the int(input()) function and store it in a variable.
Take a variable say octl_num and initialize its value with 0.
Take another variable say deciml_num and initialize its value with 0.
Again take another variable say ‘a’ and initialize its value with 0.
Loop till the given binary number is not equal to zero using the while loop.
Inside the loop, calculate the given binary number modulus 10 (to get the last digit).
Store it in a variable ‘b‘.
Calculate the value of 2 raised to the power a using the pow() function and multiply it with the above-obtained value ‘b‘.
Store it in a variable ‘c‘.
Add ‘c‘ to the above-initialized deciml_num and store it in the same variable deciml_num.
Increment the value a by 1 and store it in the same variable ‘a’.
Divide the given binary number by 10 and store it in the same variable binry_numb.
Come out of the while loop and initialize the value of ‘a’ with 1.
Loop till the decimal number is not equal to zero using the while loop.
Multiply ‘a‘ with the deciml_num modulus 8 and store it in a variable ‘d’.
Add the value of ‘d’ with the above-initialized octl_num and store it in the same variable octl_num.
Divide the deciml_num by 8 and store it in the same variable deciml_num.
Multiply ‘a’ with 10 and store it in the same variable ‘a’.
Print the octl_num to get the octal value of the given binary number.
The Exit of the Program.

Below is the implementation:

# Give the binary number as user input using the int(input()) function and store it
# in a variable.
binry_numb = int(input("Enter some random Number = "))
# Take a variable say octl_num and initialize its value with 0.
octl_num = 0
# Take another variable say deciml_num and initialize its value with 0.
deciml_num = 0
# Again take another variable say 'a' and initialize its value with 0.
a = 0
# Loop till the given binary number is not equal to zero using the while loop.
print("The Octal value of the given binary number {", binry_numb, "} is: ")
while (binry_numb != 0):
 # Inside the loop, calculate the given binary number modulus 10 (to get the last digit).
 # store it in a variable 'b'.
    b = (binry_numb % 10)
    # Calculate the value of 2 raised to the power a using the pow() function and multiply
# it with the above-obtained value 'b'.
 # Store it in a variable 'c'.
    c = pow(2, a)*b
 # Add 'c' to the above-initialized deciml_num and store it in the same variable deciml_num.
    deciml_num = deciml_num + c
    # Increment the value a by 1 and store it in the same variable 'a'.
    a += 1
 # Divide the given binary number by 10 and store it in the same variable binry_numb.
    binry_numb = binry_numb // 10
 # Come out of the while loop and initialize the value of 'a' with 1.
a = 1
# Loop till the decimal number is not equal to zero using the while loop.
while (deciml_num != 0):
    # Multiply 'a' with the deciml_num modulus 8 and store it in a variable 'd'.
    d = (deciml_num % 8) * a
 # Add the value of 'd' with the above-initialized octl_num and store it in the same
    # variable octl_num.
    octl_num = octl_num + d
    # Divide the deciml_num by 8 and store it in the same variable deciml_num.
    deciml_num = deciml_num // 8
    # Multiply 'a' with 10 and store it in the same variable 'a'.
    a = a * 10
# Print the octl_num to get the octal value of the given binary number.
print(octl_num)

Output:

Enter some random Number = 1101
The Octal value of the given binary number { 1101 } is: 
15

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