The math.ceil (ceiling) function returns the smallest integer higher or equal to x.
For Python 3:
import math
print(math.ceil(4.2))
For Python 2:
import math
print(int(math.ceil(4.2)))
W3Schools
w3schools.com › python › ref_func_round.asp
Python round() Function
Built-in Modules Random Module ... Python Training ... The round() function returns a floating point number that is a rounded version of the specified number, with the specified number of decimals....
Python
docs.python.org › 3 › library › math.html
math — Mathematical functions
4 weeks ago - The intent of the C standard is that fmod(x, y) be exactly (mathematically; to infinite precision) equal to x - n*y for some integer n such that the result has the same sign as x and magnitude less than abs(y). Python’s x % y returns a result with the sign of y instead, and may not be exactly computable for float arguments. For example, fmod(-1e-100, 1e100) is -1e-100, but the result of Python’s -1e-100 % 1e100 is 1e100-1e-100, which cannot be represented exactly as a float, and rounds to the surprising 1e100.
Videos
04:46
Is "round()" broken in Python? - YouTube
14:05
Introduction to Rounding Numbers in Python - YouTube
How to Round Numbers in Python ( Not What You Expect) - YouTube
28:51
Python Numbers Mastery | Math Functions, Round & Random | #Python ...
01:44
Rounding in Python - YouTube
08:20
Understanding the Round Function (Video) – Real Python
Mimo
mimo.org › glossary › python › round-function
Python round(): Rounding Numbers in Python
Using a negative value for the ndigits parameter, the round() function can round a floating-point number or integer to a multiple of 10. In the following example, we round 12345 to the nearest hundred (12300), simplifying the value. ... Python’s round() function works well in many cases.
Top answer 1 of 16
1382
The math.ceil (ceiling) function returns the smallest integer higher or equal to x.
For Python 3:
import math
print(math.ceil(4.2))
For Python 2:
import math
print(int(math.ceil(4.2)))
2 of 16
348
I know this answer is for a question from a while back, but if you don't want to import math and you just want to round up, this works for me.
>>> int(21 / 5)
4
>>> int(21 / 5) + (21 % 5 > 0)
5
The first part becomes 4 and the second part evaluates to "True" if there is a remainder, which in addition True = 1; False = 0. So if there is no remainder, then it stays the same integer, but if there is a remainder it adds 1.
Inspector
inspector.dev › home › round up numbers to integer in python – fast tips
Round Up Numbers to Integer in Python - Inspector.dev
June 17, 2025 - So I can also count the usage of a portion of a slot. This is just an example of the cool things that can be done rounding numbers. ... The simplest way to round a number in Python is to use the built-in round() function.
Real Python
realpython.com › python-rounding
How to Round Numbers in Python – Real Python
December 7, 2024 - To implement the rounding half up strategy in Python, you start as usual by shifting the decimal point to the right by the desired number of places. At this point, though, you need a way to determine if the digit just after the shifted decimal point is less than or greater than or equal to 5. One way to do this is to add 0.5 to the shifted value and then round down with math.floor().
IONOS
ionos.com › digital guide › websites › web development › python round function
What is Python round()? - IONOS
May 28, 2025 - If you want to round numbers in Python, the built-in round() function is the simplest and most effective method for doing so. This function returns a floating-point number that is rounded to the nearest value based on the number of decimal places ...
GeeksforGeeks
geeksforgeeks.org › python › round-function-python
round() function in Python - GeeksforGeeks
Python round() function is a built-in function available with Python. It will return you a float number that will be rounded to the decimal places which are given as input. If the decimal places to be rounded are not specified, it is considered ...
Published August 7, 2024
Server Academy
serveracademy.com › blog › python-round-function-tutorial
Python Round() Function Tutorial - Server Academy
Rounding numbers is a common operation in Python, especially when working with floating-point numbers. Python’s round() function makes it easy to round numbers to a specified number of decimal places or the nearest integer. Whether you need to round up, round down, or round to a specific decimal point, Python…
Medium
medium.com › @ElizavetaGorelova › rounding-in-python-choosing-the-best-way-c20c2a37fe29
Rounding in Python: Choosing The Best Way | by Elizaveta Gorelova | Medium
March 15, 2024 - In general, it looks like this: round(number, digits). In the first argument (number) we pass a fractional number, and in the second (digits) we indicate the number of numbers after the decimal point.
GeeksforGeeks
geeksforgeeks.org › python › how-to-round-numbers-in-python
How to Round Numbers in Python? - GeeksforGeeks
July 15, 2025 - If we want to round up to a specified decimal place, you can combine multiplication, math.ceil(), and division.
Python.org
discuss.python.org › python help
Trying to understand rounding - in python - - Python Help - Discussions on Python.org
June 17, 2023 - hello @all, I’m new here, pls. be tolerant if I harm habits I don’t know about, I’m working on bin-FP-math imprecisions, and was pointed by Steven D’Aprano that python is doing a good job - from a decimal POV - in rounding >>> round(0.30000000000000004, 16) 0.3 https://mail.gnome.org/archives/gnumeric-list/2021-July/msg00019.html ( where standard FP algorithms fail to 0.3000000000000001 reg. scaling up =0.30000000000000004 by 10^16 → 3000000000000000.5 ) searching in the forum I found th...
InterServer
interserver.net › home › programming › python round() function explained: examples, decimals, and best practices
Python round() Function Explained: Examples, Decimals, and Best Practices - Interserver Tips
October 1, 2025 - Python makes rounding numbers simple with its built-in round() function. This function can round numbers to the nearest whole number or to a specific number of decimal places. You don’t need to write long code or use complex math.
Codecademy
codecademy.com › docs › python:numpy › math methods › .round()
Python:NumPy | Math Methods | .round() | Codecademy
June 18, 2024 - Rounds a number or an array of numbers to a specified number of decimal places.
freeCodeCamp
freecodecamp.org › news › how-to-round-numbers-up-or-down-in-python
Python Round to Int – How to Round Up or Round Down to the Nearest Whole Number
May 24, 2022 - We'll start with the round() function. By default, it rounds a number to the nearest whole number. We'll also see how to use the function's parameters to change the type of result returned to us.
DataCamp
datacamp.com › tutorial › python-round-up
How to Round Up a Number in Python | DataCamp
July 22, 2024 - Discover three techniques to round up numbers in Python: using Python round up methods like math.ceil() from the math module, the decimal module, and NumPy.
Reddit
reddit.com › r/learnpython › python round() function
r/learnpython on Reddit: Python Round() Function
July 9, 2021 -
Greetings,
Code: x = round(7.85, 2) print(x)
Result: 7.8
Why is that? Rounding down starts at 0 and ends at 4, and rounding up begins at 5 and ends at 9. The result should be 7.9.
Does Python have its own math rules? If so, why? Math is math...
Please and thank you ☺
Top answer 1 of 2
3
Found an answer on https://www.programiz.com/python-programming/methods/built-in/round Note: The behavior of round() for floats can be surprising. Notice round(2.675, 2) gives 2.67 instead of the expected 2.68. This is not a bug: it's a result of the fact that most decimal fractions can't be represented exactly as a float. When the decimal 2.675 is converted to a binary floating-point number, it's again replaced with a binary approximation, whose exact value is: 2.67499999999999982236431605997495353221893310546875 Due to this, it is rounded down to 2.67. If you're in a situation where this precision is needed, consider using the decimal module, which is designed for floating-point arithmetic: from decimal import Decimal # normal float num = 2.675 print(round(num, 2)) # using decimal.Decimal (passed float as string for precision) num = Decimal('2.675') print(round(num, 2)) Hope this helps!
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1
Rounding down starts at 0 and ends at 4, and rounding up begins at 5 and ends at 9. The result should be 7.9. This is not nearly universal, nor is it the best way to round. The way you describe leads to data being biased high. From the docs: if two multiples are equally close, rounding is done toward the even choice (so, for example, both round(0.5) and round(-0.5) are 0, and round(1.5) is 2) This is a much better way to round as it doesn’t have a bias high or low.
LabEx
labex.io › tutorials › python-how-to-round-up-numbers-in-python-418689
How to round up numbers in Python | LabEx
In Python, rounding helps you convert floating-point numbers to integers or limit decimal places based on specific rules. There are several common rounding methods in Python:
Udemy
blog.udemy.com › home › using the round() function in python with floor and ceil
How to Use the Round() Function in Python - Udemy Blog
April 1, 2022 - You don’t need to import math to use the ROUND() function, but you do need to import math to use the other functions mentioned. Make sure that you’re rounding to the nearest integer. If you don’t specify the number of decimal places, Python will round to the nearest whole number.
freeCodeCamp
freecodecamp.org › news › how-to-round-to-2-decimal-places-in-python
How to Round to 2 Decimal Places in Python
August 22, 2022 - It means that you round up a number at a decimal place based on the number after it.