`oct()` Function in Python [ English ]

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1. Introduction

The oct() function in Python is a built-in function used to convert an integer number into its octal representation. The octal number is returned as a string prefixed with 0o, which indicates that the number is in base-8 (octal system).

The octal number system uses eight digits: 0–7. It is sometimes used in computing, especially in file permissions in operating systems and certain low-level programming tasks.

2. Syntax

oct(number)

Parameter

• number An integer value that needs to be converted into octal format.

3. Return Value

• Returns a string representing the octal equivalent of the integer.
• The returned string begins with 0o, which indicates octal notation.

4. Basic Example

print(oct(10))

Output

0o12

Explanation

• The decimal number 10 is converted to octal.
• In octal, 10 = 12.
• Python adds the prefix 0o to indicate octal format.

5. Example with Another Number

print(oct(25))

Output

0o31

Explanation

• The decimal number 25 is represented in octal as 31.

6. Removing the 0o Prefix

If only the octal digits are needed, the prefix can be removed.

num = 25
oct_value = oct(num)

print(oct_value[2:])

Output

31

Explanation

• oct_value[2:] removes the first two characters (0o) from the result.

7. Example with Negative Numbers

print(oct(-12))

Output

-0o14

Explanation

• Python displays the negative sign before the octal representation.

8. Practical Example

number = 64

octal_value = oct(number)

print("Decimal:", number)
print("Octal:", octal_value)

Output

Decimal: 64
Octal: 0o100

Explanation

• The decimal number 64 is equal to 100 in octal.

9. Summary

• oct() is a built-in Python function used to convert an integer into its octal representation.
• The result is returned as a string.
• The output begins with the prefix 0o, which represents octal format.
• It works only with integer values.
• It is useful for number system conversions and certain system-level tasks.