How to write a program to check palindrome using do while?

CODE

How to write a program to check palindrome using do while?

int main()

{

    int n,r,rev=0,n1;

    printf("\n enter the number:");

    scanf("%d",&n);

    n1=n;

    do

    {

        r=n%10;

        rev=rev*10+r;

        n=n/10;

    }while(n!=0);

    if(rev==n1)

        printf("\n Palindrome");

    else

        printf("\n Not palindrome");

}

Output:

enter the number: 40

 Not palindrome