You will spot a difference when using floats:
>>> 1000.5//1
1000.0
>>> floor(1000.5)
1000
floor returns an integer. For most cases 1000 and 1000.0 are equivalent, but not always.
Python
docs.python.org › 3 › library › math.html
math — Mathematical functions
3 weeks ago - Return the integer square root of the nonnegative integer n. This is the floor of the exact square root of n, or equivalently the greatest integer a such that a² ≤ n.
W3Schools
w3schools.com › python › ref_math_floor.asp
Python math.floor() Method
The math.floor() method rounds a number DOWN to the nearest integer, if necessary, and returns the result.
python - math.floor(N) vs N // 1 - Stack Overflow
I am wondering if anyone can give me any insight into how the following may be the same / different in Python3: N // 1 and from math import floor floor(N) I tried the following, which seems to in... More on stackoverflow.com
Why do Python's math.ceil() and math.floor() operations return floats instead of integers? - Stack Overflow
Ironically (as floats were used ... by floor/ceil is meaningless in the low digits because of the float representation, well before a 64 bits int would overflow. [This wasn't true in the old days of 32 bits.] ... As pointed out by other answers, in python they return floats probably because of historical reasons to prevent overflow problems. However, they return integers in python 3. >>> import math >>> ... More on stackoverflow.com
Am I understanding this Floor part of the math module correctly?
If you want to be really cheeky, floats in Python have a built in method is_integer(). More on reddit.com
7
3
January 20, 2019floor() function isn't working
After all that, you don't even necessarily need math.floor if you want an integer because int already works like that. At least for positive numbers. print(int(69.696969)) # 69 More on reddit.com
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0
July 21, 2024Videos
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Python Math floor(), ceil(), trunc(), and modf() - YouTube
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Python ceil() , floor() and round() functions| Python Math Functions| ...
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Python - Ceil() Floor() Math Method Code Practice - YouTube
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Python floor() function | math module | mathematical functions ...
Python ceil and floor Functions | Round Your Numbers Up Or Down ...
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Quora
quora.com › What-does-the-function-math-floor-in-Python-mean
What does the function 'math.floor' in Python mean? - Quora
Answer (1 of 7): In Python 2 > math.floor(x) returns floor of x as a float, the largest integer value less than or equal to x. [code]>>> import math >>> print("math.floor(-99.99) : ", math.floor(-99.99)) ('math.floor(-99.99) : ', -100.0) >>> ...
Analytics Vidhya
analyticsvidhya.com › home › understanding floor and ceiling functions in python
Floor and Ceiling Functions in Python | Applications and Behaviour
June 20, 2023 - Visualizing Patterns and Trends in DataBasics of MatplotlibBasics of SeabornData Visualization with SeabornExploring Data using Python ... The floor and ceiling functions are mathematically used to round numbers to the nearest integer. This comprehensive guide will explore the floor and ceiling functions in Python, understand their formulas, and discover their various use cases and applications.
Codecademy
codecademy.com › docs › python › math module › math.floor()
Python | Math Module | math.floor() | Codecademy
April 23, 2025 - The math.floor() function takes in a numeric data type and rounds the value down to the nearest integer. This function is part of Python’s built-in math module, which provides access to mathematical functions defined by the C standard.
GeeksforGeeks
geeksforgeeks.org › python › floor-ceil-function-python
floor() and ceil() function Python - GeeksforGeeks
Let’s take a list of floating-point numbers and apply both floor() and ceil() to each value. ... import math a = [1.1, 2.5, 3.9, 4.0, 5.8] fl = list(map(math.floor, a)) cl = list(map(math.ceil, a)) print("Floor:", fl) print("Ceil :", cl)
Published January 16, 2026
Top answer 1 of 3
11
You will spot a difference when using floats:
>>> 1000.5//1
1000.0
>>> floor(1000.5)
1000
floor returns an integer. For most cases 1000 and 1000.0 are equivalent, but not always.
2 of 3
6
math.floor(N)returns an int, andN // 1returns a float.>>> type(math.floor(-4.4)) <class 'int'> >>> type((-4.4) // 1) <class 'float'>Because of this
floor(nan)will raise ValueError whilenan // 1returns NaN (similar for ±inf.)>>> math.floor(math.nan) Traceback (most recent call last): File "<stdin>", line 1, in <module> ValueError: cannot convert float NaN to integer >>> math.nan // 1 nan
I don't think there are other differences when N is a float, since x//y is defined as ⌊x/y⌋.
Tutorialspoint
tutorialspoint.com › python › number_floor.htm
Python math.floor() Method
The Python math.floor() method is used to calculate the nearest value that is not larger than the specified number. For example, the floor value of the floating-point number 2.3 is 2.
TensorFlow
tensorflow.org › tensorflow v2.16.1 › tf.math.floor
tf.math.floor | TensorFlow v2.16.1
Returns element-wise largest integer not greater than x.
Naukri
naukri.com › code360 › library › python-math-floor-method
Python math.floor() Method - Naukri Code 360
May 25, 2024 - Almost there... just a few more seconds
Top answer 1 of 9
121
As pointed out by other answers, in python they return floats probably because of historical reasons to prevent overflow problems. However, they return integers in python 3.
>>> import math
>>> type(math.floor(3.1))
<class 'int'>
>>> type(math.ceil(3.1))
<class 'int'>
You can find more information in PEP 3141.
2 of 9
108
The range of floating point numbers usually exceeds the range of integers. By returning a floating point value, the functions can return a sensible value for input values that lie outside the representable range of integers.
Consider: If floor() returned an integer, what should floor(1.0e30) return?
Now, while Python's integers are now arbitrary precision, it wasn't always this way. The standard library functions are thin wrappers around the equivalent C library functions.
GeeksforGeeks
geeksforgeeks.org › python › python-math-floor-function
Python | math.floor() function - GeeksforGeeks
February 16, 2023 - Syntax: math.floor(x) Parameter: x: This is a numeric expression. Returns: largest integer not greater than x. Time Complexity: O(1) Auxiliary Space: O(1) ... # Python code to demonstrate the working of floor() # importing "math" for ...
W3Schools
w3schools.com › python › python_math.asp
Python Math
Python has a set of built-in math functions, including an extensive math module, that allows you to perform mathematical tasks on numbers.
Note.nkmk.me
note.nkmk.me › home › python
Round Up/Down Decimals in Python: math.floor, math.ceil
January 15, 2024 - In Python, math.floor() and math.ceil() are used to round down and up floating point numbers (float). Contents · Round down (= take the floor): math.floor() Round up (= take the ceiling): math.ceil() Difference between math.floor() and int() ...
Tutorial Gateway
tutorialgateway.org › math-floor-in-python
math floor in Python
March 29, 2025 - Python math floor is a math library function and the Floor returns the closest integer value which is less than or equal to specified exp.
Scaler
scaler.com › home › topics › math floor python
Math Floor Function in Python - Scaler Topics
May 4, 2023 - The math floor Python function returns the closest integer value that is less than or equal to the specified value. In simple words, it rounds the number down to the closest integer.
Reddit
reddit.com › r/learnpython › am i understanding this floor part of the math module correctly?
r/learnpython on Reddit: Am I understanding this Floor part of the math module correctly?
January 20, 2019 -
So I am up to the Practice makes Perfect portion of Code Academies python course, and I am onto the question where they ask you to check for an integer without using type(int).
My answer ended up being:
import math
def is_int(x):
if math.floor(x) == 0:
return True
else:
return False
print is_int(2.0)
print is_int(2.3)
However this came up with an error and I found out I had to instead write it like this:
import math
def is_int(x):
if math.floor(x) - x == 0:
return True
else:
return False
print is_int(2.0)
print is_int(2.3)
Is my understanding correct in the extra (- x) is so that when the value subtracts from itself it becomes 0 by default thus is always an integer number unlike the float?
Python documentation
docs.python.org › 3 › library › functions.html
Built-in Functions — Python 3.14.3 documentation
2 weeks ago - Take two (non-complex) numbers as arguments and return a pair of numbers consisting of their quotient and remainder when using integer division. With mixed operand types, the rules for binary arithmetic operators apply.
Upgrad
upgrad.com › home › blog › data science › floor function in python: the underrated trick!
Floor Function in Python: Definition, Uses & Examples
October 29, 2025 - The floor function in Python rounds a number down to the nearest whole integer. It’s part of the `math` module and is used to control numeric precision, handle floating-point values, and manage calculations that require rounding down.
Medium
medium.com › @kevingxyz › the-art-of-pythons-ceiling-and-floor-notation-684d4d354e1e
The Art of Python’s Ceiling and Floor using Operator | by Kevin | Medium
August 8, 2020 - During the older days during my first foray into Python, I came across this wonderful way of expressing floor: # Alternative to: # b = math.floor( 10 / 3 ) b = 10 // 3