int and long were "unified" a few versions back. Before that it was possible to overflow an int through math ops.
3.x has further advanced this by eliminating long altogether and only having int.
- Python 2:
sys.maxintcontains the maximum value a Python int can hold.- On a 64-bit Python 2.7, the size is 24 bytes. Check with
sys.getsizeof().
- On a 64-bit Python 2.7, the size is 24 bytes. Check with
- Python 3:
sys.maxsizecontains the maximum size in bytes a Python int can be.- This will be gigabytes in 32 bits, and exabytes in 64 bits.
- Such a large int would have a value similar to 8 to the power of
sys.maxsize.
W3Schools
w3schools.com › python › python_numbers.asp
Python Numbers
Python Examples Python Compiler ... Certificate Python Training ... Int, or integer, is a whole number, positive or negative, without decimals, of unlimited length....
Mimo
mimo.org › glossary › python › integer
Python Integer: Master Numeric Data Types
Integer, or int, is a data type in Python that represents whole numbers without a decimal point.
Videos
03:25
Python Data Types Explained: int, float, str & bool (2026 Tutorial) ...
05:38
Integers (Video) – Real Python
Python Integers vs Floats - Visually Explained
05:04
Python Tutorial: Integer Input - YouTube
02:56
Intro To Coding - Python Integers - YouTube
09:21
Python Tutorial of Integer For Beginners - YouTube
Python documentation
docs.python.org › 3 › library › stdtypes.html
Built-in Types — Python 3.14.3 documentation
February 25, 2026 - Deprecated since version 3.12: The use of the bitwise inversion operator ~ is deprecated and will raise an error in Python 3.16. bool is a subclass of int (see Numeric Types — int, float, complex). In many numeric contexts, False and True behave like the integers 0 and 1, respectively.
GeeksforGeeks
geeksforgeeks.org › python › python-int-function
Python int() Function - GeeksforGeeks
September 26, 2025 - The Python int() function converts a given object to an integer or converts a decimal (floating-point) number to its integer part by truncating the fractional part.
Programiz
programiz.com › python-programming › methods › built-in › int
Python int() (With Examples)
Become a certified Python programmer. Try Programiz PRO! ... The int() function converts a number or a string to its equivalent integer.
Tutorial Teacher
tutorialsteacher.com › python › python-number-type
Python Numbers: int, float, complex (With Examples)
In Python, integers are zero, positive or negative whole numbers without a fractional part and having unlimited precision, e.g. 0, 100, -10.
Top answer 1 of 9
182
int and long were "unified" a few versions back. Before that it was possible to overflow an int through math ops.
3.x has further advanced this by eliminating long altogether and only having int.
- Python 2:
sys.maxintcontains the maximum value a Python int can hold.- On a 64-bit Python 2.7, the size is 24 bytes. Check with
sys.getsizeof().
- On a 64-bit Python 2.7, the size is 24 bytes. Check with
- Python 3:
sys.maxsizecontains the maximum size in bytes a Python int can be.- This will be gigabytes in 32 bits, and exabytes in 64 bits.
- Such a large int would have a value similar to 8 to the power of
sys.maxsize.
2 of 9
25
This PEP should help.
Bottom line is that you really shouldn't have to worry about it in python versions > 2.4
Python
docs.python.org › 3 › c-api › long.html
Integer Objects — Python 3.14.3 documentation
February 24, 2026 - All integers are implemented as “long” integer objects of arbitrary size. On error, most PyLong_As* APIs return(return type)-1 which cannot be distinguished from a number. Use PyErr_Occurred() to d...
Python Land
python.land › home › python data types › python integer: non-fractional numbers (with example code)
Python Integer: Non-Fractional Numbers (With Example Code) • Python Land Tutorial
September 16, 2025 - The Python integer is a non-fractional number, like 1, 2, 45, -1, -2, and -100.
W3Schools
w3schools.com › python › ref_func_int.asp
Python int() Function
Python Examples Python Compiler ... Q&A Python Bootcamp Python Certificate Python Training ... The int() function converts the specified value into an integer number....
Python Reference
python-reference.readthedocs.io › en › latest › docs › ints
int — Python Reference (The Right Way) 0.1 documentation
Numbers are created by numeric literals or as the result of built-in functions and operators. Unadorned integer literals (including binary, hex, and octal numbers) yield plain integers unless the value they denote is too large to be represented as a plain integer, in which case they yield a ...
Tutorialspoint
tutorialspoint.com › python › python_numbers.htm
Python - Numbers
In Python, any number without the provision to store a fractional part is an integer. (Note that if the fractional part in a number is 0, it doesn't mean that it is an integer. For example a number 10.0 is not an integer, it is a float with ...
Real Python
realpython.com › ref › builtin-types › int
int | Python’s Built-in Data Types – Real Python
The built-in int data type represents integer numbers, which are whole numbers without any decimal places. Integers can be positive, negative, or zero.
Python
peps.python.org › pep-0237
PEP 237 – Unifying Long Integers and Integers | peps.python.org
February 1, 2025 - Python currently distinguishes between two kinds of integers (ints): regular or short ints, limited by the size of a C long (typically 32 or 64 bits), and long ints, which are limited only by available memory.
W3Schools
w3schools.com › python › gloss_python_int.asp
Python Int
Python Examples Python Compiler ... Certificate Python Training ... Int, or integer, is a whole number, positive or negative, without decimals, of unlimited length....
Codeguage
codeguage.com › v1 › courses › python › numbers-basics
Python Number Basics - int and float
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Learn Python
learnpython.org › en › Variables_and_Types
Variables and Types - Learn Python - Free Interactive Python Tutorial
Python supports two types of numbers - integers(whole numbers) and floating point numbers(decimals).
Kansas State University
textbooks.cs.ksu.edu › intro-python › 02-numbers › 01-integers
Integers :: Introduction to Python
June 27, 2024 - In mathematics, an integer is a whole number, such as $ 3 $, $ -5 $, or even $ 0 $. Basically, any positive or negative number that doesn’t include a fractional or decimal portion is a whole number, and therefore it is an integer. In Python, those numbers can be stored in the int data type.
GeeksforGeeks
geeksforgeeks.org › python › python-numbers
Python Numbers - GeeksforGeeks
July 15, 2025 - In Python, there is no limit to how long an integer value can be.
Tenthousandmeters
tenthousandmeters.com › blog › python-behind-the-scenes-8-how-python-integers-work
Python behind the scenes #8: how Python integers work
February 8, 2021 - Integers require no introduction. They are so ubiquitous and seem so basic that you may doubt whether it's worth discussing how they are implemented at all. Yet, Python integers are interesting because they are not just 32-bit or 64-bit integers that CPUs work with natively.