Program to check whether a number is palindrome or not - Printable Version +- Python Forum (https://python-forum.io) +-- Forum: Python Coding (https://python-forum.io/forum-7.html) +--- Forum: Homework (https://python-forum.io/forum-9.html) +--- Thread: Program to check whether a number is palindrome or not (/thread-40691.html) Pages:
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Program to check whether a number is palindrome or not - PythonBoy - Sep-07-2023 A palindrome number is a number which if written backwards also, the number will look the same Eg: 112211, 121, 898 I have a homework to write a program to check if a number is palindrome or not using concepts of loops I failed miserably. My code: Input = input("Enter any number: ") LengthOfInput = int(len(Input)) for x in range(LengthOfInput): a = 10 while Input: if Input[0] == Input[LengthOfInput]: continue if Input[x] == Input[LengthOfInput-x]: x=10 else: print("Number is not palindrome") print("The number is a palindrome") Please help with this project, it is a very interesting project that I was not able to figure out by myselfThank you! RE: Program to check whether a number is palindrome or not - snippsat - Sep-07-2023 There are servals problems here,and you can only get that error message if using Python 2.7. So Python 2 is dead💀 for many years ago,so you need to figure that out. Here some code to help. # pali.py number = input("Enter any number: ") lengt_of_input = int(len(number)) is_palindrome = True for n in range(lengt_of_input // 2): if number[n] != number[lengt_of_input- n - 1]: is_palindrome = False breakTest. # Python version,so 3.11 is newest one G:\div_code λ python -V Python 3.11.3 G:\div_code λ ptpython -i pali.py Enter any number: 898 >>> is_palindrome True G:\div_code λ ptpython -i pali.py Enter any number: 12341 >>> is_palindrome False RE: Program to check whether a number is palindrome or not - PythonBoy - Sep-07-2023 Thanks very much for the help! So are you telling me that if I download Python 3.11(newest version) then this program will work?, because I think in Python 2.7 value of len() cannot be an integer and in Python 3 value of len() can be an integer? RE: Program to check whether a number is palindrome or not - DPaul - Sep-07-2023 Hi, No loops allowed ? then try: x = '1234321' y = x[::-1] Is y == x ? Paul RE: Program to check whether a number is palindrome or not - PythonBoy - Sep-07-2023 (Sep-07-2023, 01:33 PM)DPaul Wrote: Hi, No loops allowed ? then try: Thanks for the reply but the homework is to do it using loops RE: Program to check whether a number is palindrome or not - snippsat - Sep-07-2023 (Sep-07-2023, 01:23 PM)PythonBoy Wrote: So are you telling me that if I download Python 3.11(newest version) then this program will work?, because I think in Python 2.7 value of len() cannot be an integer and in Python 3 value of len() can be an integer?The problem is line before input("Enter any number: ") in Python 2.7 this will return a integer,and in Python 3(input() change) it will return a string.Yes it will work with Python 3.11. RE: Program to check whether a number is palindrome or not - PythonBoy - Sep-07-2023 (Sep-07-2023, 01:33 PM)DPaul Wrote: Hi, No loops allowed ? then try: Although this is not the want, my teacher wants me to do it, I am interested in this method also. Could you please explain why did we write y = x[::-1]? RE: Program to check whether a number is palindrome or not - PythonBoy - Sep-07-2023 (Sep-07-2023, 01:38 PM)snippsat Wrote:(Sep-07-2023, 01:23 PM)PythonBoy Wrote: So are you telling me that if I download Python 3.11(newest version) then this program will work?, because I think in Python 2.7 value of len() cannot be an integer and in Python 3 value of len() can be an integer?The problem is line before Oh Thank you very much for the good news, I will download the newest version of Python and try it out RE: Program to check whether a number is palindrome or not - PythonBoy - Sep-07-2023 (Sep-07-2023, 01:42 PM)PythonBoy Wrote:(Sep-07-2023, 01:33 PM)DPaul Wrote: Hi, No loops allowed ? then try: RE: Program to check whether a number is palindrome or not - DPaul - Sep-07-2023 (Sep-07-2023, 01:43 PM)PythonBoy Wrote: I am interested in this method also. Could you please explain why did we write y = x[::-1]? Look here: https://www.guru99.com/1-in-python.html Paul |