That's hardly cheating, and is now I'd do it unless that method was explicitly forbidden (I had that once). Your div/mod way is more complicated, and in my experience, likely doesn't have much in the way of noticeable performance advantages anyway. Abusing strings is often a good solution surprisingly (but consider each case individually). Answer from carcigenicate on reddit.com
GeeksforGeeks
geeksforgeeks.org › python › python-program-to-reverse-a-number
Python Program to Reverse a Number - GeeksforGeeks
November 18, 2025 - This method reverses the number by converting it to a string, slicing it in reverse order and converting it back to an integer.
Programiz
programiz.com › python-programming › examples › reverse-a-number
Python Program to Reverse a Number
Created with over a decade of experience and thousands of feedback. ... To understand this example, you should have the knowledge of the following Python programming topics: ... num = 1234 reversed_num = 0 while num != 0: digit = num % 10 reversed_num = reversed_num * 10 + digit num //= 10 print("Reversed Number: " + str(reversed_num)) ... First, the remainder of the num divided by 10 is stored in the variable digit.
Can anyone explain how to reverse a integer number?
That's hardly cheating, and is now I'd do it unless that method was explicitly forbidden (I had that once). Your div/mod way is more complicated, and in my experience, likely doesn't have much in the way of noticeable performance advantages anyway. Abusing strings is often a good solution surprisingly (but consider each case individually). More on reddit.com
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38
February 1, 2022Reversing a number
Hint: strings are reversible More on reddit.com
9
2
September 17, 2020How can I reverse a number in Python using a string?
You can convert the number to a string with str(), reverse it using slicing ([::-1]), and then turn it back into an integer using int().
wscubetech.com
wscubetech.com › resources › python › programs › reverse-number
Reverse a Number in Python (5 Different Ways)
Can I reverse a number using loops in Python?
Yes, you can reverse a number by using a while loop. Divide the number by 10 to extract digits and multiply the result by 10 to rebuild the reversed number step by step.
wscubetech.com
wscubetech.com › resources › python › programs › reverse-number
Reverse a Number in Python (5 Different Ways)
What are the benefits of using recursion to reverse a number in Python?
Recursion simplifies the process by repeatedly calling the function to break down the number and reverse it until it’s done.
wscubetech.com
wscubetech.com › resources › python › programs › reverse-number
Reverse a Number in Python (5 Different Ways)
Reddit
reddit.com › r/learnpython › can anyone explain how to reverse a integer number?
r/learnpython on Reddit: Can anyone explain how to reverse a integer number?
February 1, 2022 -
Sorry if that sound like stupid, I'm just a newbie to programming
At first I thought it was easy and started writing code and I find myself with bunch of errors.
Then I came up with this:
number = 12345 reverse = str(number)[::-1] print(reverse)
It's just cheating you can say, I converted integer into string and made that string reverse.
After a while I thought, I'm just stupid to code like this but then later I googled and I found this solution which is more complicated to understand:
number = 12345 reverse = 0 while number > 0: last_digit = number % 10 reverse = reverse * 10 + last_digit number = number // 10 print(reverse)
Can anyone please explain what's going on here?
Top answer 1 of 15
50
That's hardly cheating, and is now I'd do it unless that method was explicitly forbidden (I had that once). Your div/mod way is more complicated, and in my experience, likely doesn't have much in the way of noticeable performance advantages anyway. Abusing strings is often a good solution surprisingly (but consider each case individually).
2 of 15
23
It's also worth noting they are not the same. Because your method not only returns a string, it also evaluates the reverse as a string. e.g. number = 12340 #Notice the number ends in 0 string result is: '04321' integer result is: 4321
Top answer 1 of 16
19
Without converting the number to a string:
def reverse_number(n):
r = 0
while n > 0:
r *= 10
r += n % 10
n /= 10
return r
print(reverse_number(123))
2 of 16
9
You are approaching this in quite an odd way. You already have a reversing function, so why not make line just build the line the normal way around?
def line(bottles, ending):
return "{0} {1} {2}".format(bottles,
plural("bottle", bottles),
ending)
Which runs like:
>>> line(49, "of beer on the wall")
'49 bottles of beer on the wall'
Then pass the result to reverse:
>>> reverse(line(49, "of beer on the wall"))
'llaw eht no reeb fo selttob 94'
This makes it much easier to test each part of the code separately and see what's going on when you put it all together.
Scaler
scaler.com › home › topics › reverse a number in python
Reverse a Number in Python - Scaler Topics
June 21, 2024 - In this way, the new string so ... Scaler learners achieved 2.5x salary growth with average post-Scaler CTC reaching ₹23L. ... We use the python reversed() function to reverse a number by this method....
Medium
medium.com › @ArunaKale › python-program-to-reverse-a-number-traditional-and-list-methods-explained-step-by-step-478de7b8e0db
How to Reverse a Number in Python: 4 Easy Methods (with Code Examples for Beginners) | by Aruna | Medium
December 17, 2025 - # Python Program to Reverse a Number (Hardcoded Value) # Step 1: Hardcode a number num = 12345 # Step 2: Initialize a variable to store the reversed number rev = 0 # Step 3: Use a while loop to reverse the number while num != 0: digit = num ...
GitHub
gist.github.com › hossainlab › b58bd9b22dfeb5eeedba4ee37c007946
Python Program To Reverse a Given Number · GitHub
n = int(input("Enter a number: ")) reversed_number = 0 while(n>0): last_digit = n reversed_number = reversed_number*10+last_digit n = n//10 print("The reversed number is: ",reversed_number)
W3Schools
w3schools.com › python › ref_list_reverse.asp
Python List reverse() Method
The built-in function reversed() returns a reversed iterator object. ... If you want to use W3Schools services as an educational institution, team or enterprise, send us an e-mail: sales@w3schools.com · If you want to report an error, or if you want to make a suggestion, send us an e-mail: help@w3schools.com · HTML Tutorial CSS Tutorial JavaScript Tutorial How To Tutorial SQL Tutorial Python Tutorial W3.CSS Tutorial Bootstrap Tutorial PHP Tutorial Java Tutorial C++ Tutorial jQuery Tutorial
Vultr
docs.vultr.com › python › examples › reverse-a-number
Python Program to Reverse a Number | Vultr Docs
December 9, 2024 - Pythonic approaches, such as string slicing, mathematical manipulation, and recursion, enabling you to understand the nuances of each method. Start by converting the number to a string. Use string slicing to reverse the string. Convert the reversed ...
WsCube Tech
wscubetech.com › resources › python › programs › reverse-number
Reverse a Number in Python (5 Different Ways)
October 29, 2025 - Explore 5 different ways to reverse a number in Python. Get step-by-step code examples, outputs, and clear explanations to enhance your understanding.
Quora
quora.com › How-can-I-reverse-a-number-using-Python
How to reverse a number using Python - Quora
Answer (1 of 27): There are many ways to reverse a number in python. One way to do it is by using the standard logic to reverse a number which goes as : 1. Initialize a variable as 0. 2. Get the last digit of your number by taking the remainder obtained after dividing by 10. The modulus operator...
YouTube
youtube.com › watch
Python Program #80 - Reverse a Number in Python - YouTube
Python Program #80 - Reverse a Number in PythonIn this video by Programming for beginners we will see Python Program to Reverse a Number in Python for beginn...
Published August 25, 2023
W3Schools
w3schools.com › python › python_howto_reverse_string.asp
How to reverse a String in Python
Python Examples Python Compiler Python Exercises Python Quiz Python Challenges Python Practice Problems Python Server Python Syllabus Python Study Plan Python Interview Q&A Python Bootcamp Python Training ... Learn how to reverse a String in Python.
Medium
medium.com › edureka › reverse-a-number-6eeb7eed0309
How to reverse a number in Python? | Edureka
February 4, 2021 - This article will help you understand and implement the ways to reverse a number. It will cover the following topics - ... It’s simple! You can write a Python program that takes an input number and reverse the same. The value of an integer is stored in a variable that is checked using a condition and then each digit of the number is stored in another variable, which will print the reversed number.
Naukri
naukri.com › code360 › library › python-program-to-reverse-a-number
Python Program to Reverse a Number - Naukri Code 360
Almost there... just a few more seconds
Educative
educative.io › answers › how-to-reverse-a-given-number-in-python
How to reverse a given number in Python
Then, we multiply the current reverse value by 10, which shifts the digits one place to the left, and we add the remainder to the resultant number. Finally, we update the given number by performing integer division by 10, which discards its last digit. Let’s implement this approach in Python to reverse a number using while loop iteration, as follows:
YouTube
youtube.com › watch
Python Program to Reverse a Number ( using String Method Tutorial ) - YouTube
In this tutorial you will learn to Reverse a Number ( using String method ) in Python Programming language.We ask the user to enter a number and store it in ...
Published September 10, 2020
Sanfoundry
sanfoundry.com › python-program-reverse-given-number
Reverse a Number in Python - Sanfoundry
June 21, 2023 - Testcase 2: In this case, we are entering the number “4538” as input. ... In this approach, we will use slice operator [::-1] to reverse the string. ... Here is the source code of the Python Program to reverse a given number using Slice Operator.
PYnative
pynative.com › home › python › programs and examples › python programs to reverse an integer number
Python Reverse a Number [4 Ways] – PYnative
March 31, 2025 - Learn to reverse a number in Python using different ways such string slicing, a mathematical approach, recursion and using list reversal
GeeksforGeeks
geeksforgeeks.org › dsa › write-a-program-to-reverse-digits-of-a-number
Reverse Digits of a Number - GeeksforGeeks
Try It Yourself · Table of Content ... idea for this approach is to repeatedly extract the last digit of n using the modulus operator (n % 10) and appending it to the reverse number (revNum)....
Published April 3, 2026