Palindrome Number

Problem

Return True if the integer x reads the same forwards and backwards, and False otherwise.

Negative numbers are never palindromes because of the minus sign. Reverse the digits arithmetically and compare with the original.

Hint

Building the reversed number with rev * 10 + digit avoids converting to a string.

case 1

in: [121]

expected: true

case 2

in: [-121]

expected: false

case 3

in: [10]

expected: false

case 4

in: [0]

expected: true

case 5

in: [12321]

expected: true

Starter codePython

def palindrome_number(x):
    # Your code here
    pass

5 test cases · run your code against them in the editor