## Python Integral Types

Python gives us two integral types: int and bool. These two types are immutable. This is how they are used in Boolean expressions:

• `0` and `False` are `False`.
• Any other integer and `True` are `True`.

## Integers

In Python the size of an integer is only limited by the host machine's memory. Integers literals are written using base 10(decimal) by default. However, you can use other notations like Hexadecimal, Octal and Binary.

``````>>> 0xBEBEBE
12500670
``````

OCTAL

``````>>> 0o6752222
1823890
``````

BINARY

``````>>> 0b010101001100101011001011
5556939
``````

Hexadecimal numbers have a leading `0x`, Octal numbers a leading `0o` while Binary numbers a leading `0b`.

### Creating Integer

Integer objects can be created by:

• Assigning a literal value to an identifier.

``````>>> age = 60
>>> print(age)
60
``````
• Invoking the relevant data type function and passing the literal value as a parameter:

``````>>> age = int(65)
>>> print(age)
65
``````

If you don't supply the literal value, then a default is assigned to the integer object.

``````>>> lines = int()
>>> print(lines)
0
``````

What about if I supply floating point number:

``````>>> num_people = int(20.7)
>>> print(num_people)
20
``````

What about if I supply a value that cannot be converted into an integer. A ValueError exception gets raised:

``````>>> num_people = int("I don't know")
Traceback (most recent call last):
File "<input>", line 1, in <module>
ValueError: invalid literal for int() with base 10: "I don't know"
``````

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