palindrome no example

Here is an example of C++ code to check if a number is a palindrome, along with explanations for each step:

#include <iostream>
using namespace std;

int main() {
   int num, reversedNum = 0, remainder, originalNum;

   cout << "Enter an integer: ";
   cin >> num;

   originalNum = num;

   // Reversing the number
   while (num != 0) {
      remainder = num % 10;
      reversedNum = reversedNum * 10 + remainder;
      num /= 10;
   }

   // Checking if the number is a palindrome
   if (originalNum == reversedNum)
      cout << originalNum << " is a palindrome.";
   else
      cout << originalNum << " is not a palindrome.";

   return 0;
}

Explanation:

1. The code starts by including the necessary header file iostream and using the std namespace to avoid typing std:: before standard library functions.

2. The main() function is defined, which is the entry point of the program.

3. Variables num, reversedNum, remainder, and originalNum are declared. num will hold the user input, reversedNum will store the reversed number, remainder will store the remainder of the division, and originalNum will store the original input number.

4. The user is prompted to enter an integer using the cout stream and the input is stored in the variable num using the cin stream.

5. The value of num is assigned to originalNum to keep a copy of the original input.

6. The code enters a while loop that continues until num becomes zero. This loop reverses the number by repeatedly dividing num by 10 and adding the remainder to reversedNum after multiplying it by 10.

7. After the loop ends, the code checks if the originalNum is equal to reversedNum. If they are equal, the number is a palindrome, and a message is printed to the console confirming this. Otherwise, a message is printed indicating that the number is not a palindrome.

8. The main() function returns 0, indicating successful execution of the program.

This code takes an integer input from the user and checks if it is a palindrome number. A palindrome number is a number that remains the same when its digits are reversed.