Check for palindrome number

A palindrome number is a number that remains the same when digits are reversed. For example, the number 125521 is a palindrome number, but 1451 is not.

Program Logic:

• First, Declare a variable reverseNum and initialize it with 0.
• Now, make a while loop till the original number is greater than zero.
• In every loop, get the last digit of the number and add that digit at the end of the reverseNum and then, divide the original number by 10.

reverseNum = reverseNum * 10 + (number % 10)

• Lastly, check if the original number and reverseNum number are equal or not.

Program code:

#include<bits/stdc++.h>
using namespace std;

void check_palin(int n){
    int temp=n;
    int reverseNum=0;
    do
     {
         int r = temp % 10;
         reverseNum = (reverseNum * 10) + r;
         temp = temp / 10;
     } while (temp != 0);

    if(n==reverseNum){
        cout<<n<<" is a palindrome number";
    }
    else{
        cout<<n<<" is not a palindrome number";
    }
}

int main(){
    int num;
    cout<<"Enter the number: ";
    cin>>num;
    check_palin(num);
    return 0;
}

Output:

Enter the number: 112232211
112232211 is a palindrome number

Note: also read about Check for Prime number

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