# Python oct()

The built-in function oct() is used to get an octal value of a given integer number. This method takes a single argument and returns a converted octal string prefixed with “0o”.

``````
oct(x) #where x must be an integer number and can be binary,decimal or hexadecimal format
```
```

## oct() Parameters:

Takes a single parameter. This function throws a TypeError if the argument type is other than an integer.

Parameter Description Required / Optional
integer number  maybe in binary, decimal, or hexadecimal Required

## oct() Return Value

If we pass an object as an argument, in such case, the object must have __index__() function implementation to return an integer.

Input Return Value
integer number octal string

## Examples of oct() method in Python

### Example 1: How oct() works in Python?

``````
# decimal to octal
print('oct(10) is:', oct(10))

# binary to octal
print('oct(0b101) is:', oct(0b101))

print('oct(0XA) is:', oct(0XA))
```
```

Output:

```oct(10) is: 0o12
oct(0b101) is: 0o5
oct(0XA) is: 0o12
```

### Example 2: The oct() for custom objects

``````
class Person:
age = 23

def __index__(self):
return self.age

def __int__(self):
return self.age
pers
print('The oct is:', oct(person))
```
```

Output:

```The oct is: 0o27
```

Here, the class Person implements __index__() and __int__(). That's because we can use oct() on the objects of Person.

### Example 3:The oct() function throws an error

``````
# Python oct() function example
# Calling function
val = oct(10.25)
# Displaying result
print("Octal value of 10.25:",val)
```
```

Output:

```TypeError: 'float' object cannot be interpreted as an integer
```
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