palindromeleetcode.cpp

//to check whether a number is a palindrome number or not

class Solution {
public:
    int reverse(int x) {
        
        long long int t = x;
        
        long long int rev = 0;
        while(t != 0){
            // While t is not equal to 0, 
            int a = t % 10; // store last digit of the t
            rev = (rev * 10) + a; // and add a to the rev 
            t = t/10;
        }
        // Finally we get reverse number
        return rev;
    }
    
    bool isPalindrome(int x) {
        // If negative number return false;
        if(x < 0){
            return false;
        }
        
        int t = reverse(x);
        // reverse it and compare with x if same return true else false
        if(t == x){
            return true;
        }
        else{
            return false;
        }
    }
};

Program to check  whether a number is palindrom is  using temp variable.
    #include <iostream>
using namespace std;


int main ()
{
   
    int num, reverse = 0, rem, temp;
    num=12321;
    cout <<"\nThe number is: "<<num; 
   
 
    temp = num;
    
    while(temp != 0)
    {
        rem = temp % 10;
        reverse = reverse * 10 + rem;
        temp /= 10;
    };
    
    
    if (num == reverse)
        cout << num << " is Palindrome";
    else
        cout << num << " is not a Palindrome";

}