Python oct() Function

The Python oct() function is used to convert an integer value into its octal (base-8) representation.

Unlike the familiar base-10 (decimal) system that ranges from 0 to 9, octal uses only the digits "0 to 7". When you see a number prefixed with "0o" in Python, such as '0o17', it means it is in octal notation.

Syntax

Following is the syntax of python oct() function

oct(x)

Parameters

This function accepts an integer value as its parameter.

Return Value

This function returns a string representing the octal value of the given integer.

Example 1

Following is an example of the Python oct() function. Here, we are converting the integer "219" to its octal representation

integer_number = 219
octal_number = oct(integer_number)
print('The octal value obtained is:', octal_number)

Output

Following is the output of the above code

The octal value obtained is: 0o333

Example 2

Here, we are retrieving the octal representation of a negative integer "-99" using the oct() function

negative_integer_number = -99
octal_number = oct(negative_integer_number)
print('The octal value obtained is:', octal_number)

Output

The output obtained is as follows

The octal value obtained is: -0o143

Example 3

Now, we are using the oct() function to convert a binary and a hexadecimal value to their corresponding octal representation

binary_number = 0b1010
hexadecimal_number = 0xA21
binary_to_octal = oct(binary_number)
hexadecimal_to_octal = oct(hexadecimal_number)
print('The octal value of binary number is:', binary_to_octal)
print('The octal value of hexadecimal number is:', hexadecimal_to_octal)

Output

The result produced is as follows

The octal value of binary number is: 0o12
The octal value of hexadecimal number is: 0o5041

Example 4

In the example below, we are removing the "0o" prefix from the output when converting integer value "789" to its octal representation using the oct() function

integer_number = 789
octal_noprefix = oct(integer_number)[2:]
print('The octal value of the integer without prefix is:', octal_noprefix)

Output

The output of the above code is as follows

The octal value of the integer is: 1425

Example 5

If we pass a non-integer value to the oct() function, it will raise a TypeError.

Here we will demonstrate the TypeError by passing a floating point value "21.08" to the oct() function

# Example to demonstrate TypeError
floating_number = 21.08
octal_number = oct(floating_number)
print('The octal value of the floating number is:', octal_number)

Output

We can see in the output that we get a TypeError because we have passed a floating point value to the oct() function

Traceback (most recent call last):
  File "C:\Users\Lenovo\Desktop\untitled.py", line 3, in <module>
    octal_number = oct(floating_number)
TypeError: 'float' object cannot be interpreted as an integer