I don't think using string formatting actually satisfies what the question is asking. You're not truly rounding, you're displaying a rounded value. See below: user_input = int(input("Number of digits to round to: ") rounding = 10 ** user_input mypi = int(pi * rounding) / rounding Or if you want to do it a bit more concisely: mypi = int(pi * (rounding := 10 ** user_input)) / rounding Answer from Deleted User on reddit.com
Reddit
reddit.com › r/learnpython › how to round without using round()
r/learnpython on Reddit: how to round without using round()
September 4, 2023 -
I had this python challenge in class where we had to take input from a user to see what digits to round pi to and we had to print the result without using the round() function. so for example if the input was 5, then it would print out 3.14159. im not sure how to do it without using round(). I tried using {:.f} string formatting but I cannot insert a variable, only a number
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The f-string {...} brackets can be nested. Try replacing the "number of places" "y" number in {...:x.yf}with another {...} replacement: import math numplaces = 6 print(f"{math.pi:.{numplaces}f}")
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I don't think using string formatting actually satisfies what the question is asking. You're not truly rounding, you're displaying a rounded value. See below: user_input = int(input("Number of digits to round to: ") rounding = 10 ** user_input mypi = int(pi * rounding) / rounding Or if you want to do it a bit more concisely: mypi = int(pi * (rounding := 10 ** user_input)) / rounding
Trying to understand rounding - in python -
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 round… More on discuss.python.org
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June 17, 2023How to round up without math modules?
Casting a float as an integer will always round down, you can make use of that to create your own 'roundup' function by just casting your number as an int, then adding 1. The exception to that is if your number is already an integer - in that case we don't want to do anything to it, we can handle this case separately beforehand. def round_up(x): if int(x)==x: return int(x) else: return int(x) + 1 More on reddit.com
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July 23, 2021Question: how to round In python?
You don't want to round it, you want to floor it, which lowers the number to the nearest whole. >>> import math >>> math.floor(91.66667) 91 >>> math.floor(99.9) 99 >>> math.floor(2.1) 2 More on reddit.com
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September 21, 2018how to limit or round a float to only two decimals without rounding up
You can try the solution here: https://stackoverflow.com/a/62435913 More on reddit.com
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January 19, 2024Videos
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Introduction to Rounding Numbers in Python - YouTube
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Is "round()" broken in Python? - YouTube
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How To Round Numbers in Python - YouTube
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Python Tutorial: Round Function Python - YouTube
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 - If we want accuracy without writing additional algorithms, we can use the math library built into Python. It has functions that allow us to round a number quickly and without any additional functions.
W3Schools
w3schools.com › python › ref_func_round.asp
Python round() Function
The round() function returns a floating point number that is a rounded version of the specified number, with the specified number of decimals. The default number of decimals is 0, meaning that the function will return the nearest integer.
DataCamp
datacamp.com › tutorial › python-round-up
How to Round Up a Number in Python | DataCamp
July 22, 2024 - Rounding a number involves adjusting a number based on the value of the fraction part. Truncating a number removes the fractional part of the number without rounding. If you want to round down instead of rounding up in Python, you can use the ...
Mimo
mimo.org › glossary › python › round-function
Python round(): Rounding Numbers in Python
If precision is critical, Python’s decimal module provides a way to avoid floating-point precision issues. The decimal module allows you to work with decimal numbers while avoiding the rounding errors of float numbers. ... from decimal import Decimal, ROUND_HALF_UP # Create Decimal objects instead of using floats num = Decimal('2.675') # Use the quantize() method to round to two decimal places with rounding mode ROUND_HALF_UP rounded_num = num.quantize(Decimal('0.01'), rounding=ROUND_HALF_UP) print(rounded_num) # Outputs: 2.68
Real Python
realpython.com › python-rounding
How to Round Numbers in Python – Real Python
December 7, 2024 - In this tutorial, you'll learn what kinds of mistakes you might make when rounding numbers and how you can best manage or avoid them. It's a great place to start for the early-intermediate Python developer interested in using Python for finance, data science, or scientific computing.
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...
GeeksforGeeks
geeksforgeeks.org › python › round-function-python
round() function in Python - GeeksforGeeks
... Note: In Python, if we round off numbers to floor or ceil without giving the second parameter, it will return 15.0 for example and in Python 3 it returns 15, so to avoid this we can use (int) type conversion in Python.
Published August 7, 2024
Sololearn
sololearn.com › en › Discuss › 3103388 › how-do-i-round-up-the-the-nearest-whole-number-without-importing-math-thanks
how do i round up the the nearest whole number without importing math. Thanks | Sololearn: Learn to code for FREE!
how do i round up the the nearest whole number without importing math. i did y + 0.999 . it did work but doesn't seem the right way. numpaint = int(input()) canv = 40 pt = 5 x = (numpaint * pt) + canv y = (x * 1.1) # 10% y = y + 0.999 # to round up? print(int(y)) ... Mr Steven Kervick🇺🇦 there is a way to get the smallest floating point number, which is called epsilon. Use that to add *almost* 1.0, but just enough under 1.0 that it won't round up an exact integer.
AskPython
askpython.com › home › round up numbers in python without math.ceil()
Round Up Numbers in Python Without math.ceil() - AskPython
June 30, 2023 - All of the functions present on your calculator have an equivalent in Python’s math module. The math module provides all operations that can be carried out using real numbers. However, this module does not support operations on complex numbers. It provides all functionalities as per the C standard. You can find the square root of numbers, remainders, use ceiling and floor functions as well using this module. It is very easy to install and has tons of substitutions for easy switching.
Reddit
reddit.com › r/learnpython › how to round up without math modules?
How to round up without math modules? : r/learnpython
July 23, 2021 - Subreddit for posting questions ... a float as an integer will always round down, you can make use of that to create your own 'roundup' function by just casting your number as an int, then adding 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 - Code examples to help you understand how to round numbers in Python using different methods and libraries.
Quora
quora.com › How-do-you-round-numbers-in-Python
How to round numbers in Python - Quora
Answer (1 of 11): Use [code ]math.floor[/code] to round down, math.ceil to round up and [code ]round[/code] to round to nearest integer. [code]>>> math.floor(4.4), math.floor(4.5), math.floor(5.4), math.floor(5.5) (4.0, 4.0, 5.0, 5.0) >>> round(4.4), round(4.5), round(5.4), round(5.5) (4.0, 5.0,...
Python.org
discuss.python.org › python help
Trying to understand rounding - in python - - Page 2 - Python Help - Discussions on Python.org
September 10, 2023 - We can’t easily change the rounding mode in core Python, but we can in the mpmath module: import mpmath magic = mpmath.mpf(0.49999999999999994) print(repr(mpmath.fadd(0.5, magic))) # mpf('1.0') print(repr(mpmath.fadd(0.5, magic, rounding='f'))) ...
GeeksforGeeks
geeksforgeeks.org › python › how-to-round-numbers-in-python
How to Round Numbers in Python? - GeeksforGeeks
July 15, 2025 - When rounding large datasets, we must avoid rounding bias. Python supports several rounding methods for that and most generally used methods are:
Reddit
reddit.com › r/learnpython › question: how to round in python?
r/learnpython on Reddit: Question: how to round In python?
September 21, 2018 -
Is it possible to make 91.666666667 to 91.0 without rounding it up?
Server Academy
serveracademy.com › blog › python-round-function-tutorial
Python Round() Function Tutorial - Server Academy
Whether you need to round up, round down, or round to a specific decimal point, Python has you covered with its versatile round() function. In this tutorial, we’ll cover everything you need to know about the round() function, including how to use it, how to round up or down, and practical examples for common rounding tasks.
Replit
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How to round down in Python
February 6, 2026 - Tell Replit Agent: "Build a time converter using math.floor()" or "Create a discount calculator that rounds prices down to the nearest dollar." Replit Agent writes the code, tests for errors, and deploys your application automatically. Start building with Replit. ... Create and deploy websites, automations, internal tools, data pipelines and more in any programming language without setup, downloads or extra tools.
Reddit
reddit.com › r/learnpython › how to limit or round a float to only two decimals without rounding up
r/learnpython on Reddit: how to limit or round a float to only two decimals without rounding up
January 19, 2024 -
Hello,
Does anyone know how to limit or round a float to only two decimals without rounding up?
for example,
if the number is 3.149, then I want the output to be 3.14. If the number is 3.0, then the output must be 3.00
thank you