# C++ Program to check Whether a Number is Palindrome or Not

In the previous article, we have discussed C++ Program to print ASCII Value of All Alphabets. In this article, we will see C++ Program to check Whether a Number is Palindrome or Not.

## C++ Program to check Whether a Number is Palindrome or Not

• Write a C++ program to check whether a number is palindrome or not.

Before jumping to a C++ program to check whether a number is palindrome or not, here is a brief overview of palindrome numbers.

A number is palindrome, if number remains same after reversing it’s digits.

For Example:
1234321 is palindrome number, but 123456 is not a palindrome number.

To check whether N is palindrome number or not, first of all we have to reverse the sequence of digits of N and then compare it with original N. If both are equal then N is palindrome number.

Algorithm to check a number is palindrome or not

• Take a number as input from user and store it in an integer variable(Let’s call it inputNumber).
• Reverse the digits of inputNumber, and store it in another integer variable(Let’s call it reverseNumber).
• Compare inputNumber and reverseNumber.
• If both are equal then inputNumber is palindrome number otherwise not a palindrome number.

### C++ program to check palindrome number

#include <iostream>

using namespace std;

int main(){
int inputNumber, reverseNumber = 0, rightDigit, temp;
cout << "Enter a number\n";
cin >> inputNumber;

temp = inputNumber;
// reverse inputNumber and store it in reverseNumber
while(temp != 0){
rightDigit = temp % 10;
reverseNumber = (reverseNumber * 10) + rightDigit;
temp = temp/10;
}
// If input Number and reverse Number are same
// then palindrome othrwise not
if(reverseNumber == inputNumber){
cout << inputNumber << " is Palindrome Number";
} else {
cout << inputNumber << " is not a Palindrome Number";
}

return 0;
}

Output

Enter a number
1234321
1234321 is Palindrome Number

Enter a number
123456
123456 is not a Palindrome Number


In above program, we first take a number as input from user using cin and store it in variable original. Copy the value of original variable to another variable copy. Then using a while loop, we reverse the sequence of digits of a number. Finally, we compare reverse and original number. If both are equal then input number is palindrome otherwise not a palindrome number.

If you are a newbie to the programming languages and want to explore all Example C++ Program for acquiring the best coding skills. Have a look at our C++ Programs Tutorial.