Reverse and Add Function - GeeksforGeeks


Reverse and Add Function - GeeksforGeeks
The reverse and add function starts with a number, reverses its digits, and adds the reverse to the original. If the sum is not a palindrome, repeat this procedure until it does.
Write a program that takes number and gives the resulting palindrome (if one exists). If it took more than 1,000 iterations (additions) or yield a palindrome that is greater than 4,294,967,295, assume that no palindrome exist for the given number.
    /* Iterative function to reverse digits of num*/
    long reversDigits(long num)
    {
        long rev_num = 0;
        while (num > 0)
        {
            rev_num = rev_num*10 + num%10;
            num = num/10;
        }
        return rev_num;
    }
 
    /* Function to check whether he number is
           palindrome or not */
    boolean isPalindrome(long num)
    {
        return (reversDigits(num) == num);
    }
 
    /* Reverse and Add Function */
    void ReverseandAdd(long num)
    {
        long rev_num = 0;
        while (num <= 4294967295l)
        {
            // Reversing the digits of the number
            rev_num = reversDigits(num);
 
            // Adding the reversed number with the original
            num = num + rev_num;
 
            // Checking whether the number is palindrome or not
            if(isPalindrome(num))
            {
                System.out.println(num);
                break;
            }
            else if (num > 4294967295l)
            {
                System.out.println("No palindrome exist");
            }
        }
    }
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