TheProgrammingPortal

In this tutorial you will see how to convert decimal numbers into octal numbers using logical implementation with string. Also, we will use built in methods and understand each line in detail.

Source code

decimal_number = int(input("Enter any positive integer value:"))

# Method - 1 - using custom logic
def decimal_to_octal(num):

    octal_value = ""

    while num > 0:
        remainder = num % 8
        octal_value = octal_value + str(remainder)
        # octal_value = str(remainder) + octal_value  #  without reverse approach
        num = num // 8

    return octal_value[::-1]
    # return octal_value # if without reverse approach used

output = decimal_to_octal(decimal_number)
print('Octal Value:', output)

# Method - 2 - using built-in function - oct()
output = oct(decimal_number)
print('Octal:', output[2:])

# Method - 3 - using built-in function - format()
output = format(decimal_number, 'o')
print('Octal:', output)